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179 results on '"Catherine Boussard-Plédel"'

1. Tracking solid electrolyte interphase dynamics using operando fibre-optic infra-red spectroscopy and multivariate curve regression

Author

Cédric Leau, Yu Wang, Charlotte Gervillié-Mouravieff, Steven T Boles, Xiang-Hua Zhang, Simon Coudray, Catherine Boussard-Plédel, and Jean-Marie Tarascon

Subjects
Science
Abstract

Abstract As batteries drive the transition to electrified transportation and energy systems, ensuring their quality, reliability, lifetime, and safety is crucial. While the solid electrolyte interphase (SEI) is known to govern these performance characteristics, its dynamic nature makes understanding its nucleation, growth, and composition an ambitious, yet elusive aspiration. This work employs chalcogenide fibres embedded in negative electrode materials for operando Infra-red Fibre-optic Evanescent Wave Spectroscopy (IR-FEWS), combined with Multivariate Curve Resolution by Alternating Least Squares (MCR-ALS) algorithms for spectra analysis. By establishing molecular fingerprints that can be used to identify reaction products, IR-FEWS combined with MCR-ALS enables improved understanding of SEI evolution during cell formation with notable differences stemming from electrolyte or anode material. For example, despite operating at an elevated potential, lithium titanate’s SEI has intrinsic instability, evidenced by continued carbonate formation. This approach leads the hunt for the SEI down a new path, giving empirical formulations theoretical roots.

Published
2025
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2. Femtosecond Laser Fabrication of Gradient Index Micro-Optics in Chalcogenide Glass

Author

Thien Le Phu, Mariel Ledesma Molinero, Catherine Boussard-Plédel, David Le Coq, and Pascal Masselin

Subjects
gradient refractive index, optical components, femtosecond laser writing, chalcogenide glass, mid-infrared, lens, Applied optics. Photonics, TA1501-1820
Abstract

Gradient refractive index (GRIN) lenses have been widely used for many applications. However, the traditional manufacturing methods of GRIN lenses are very time-consuming and only suitable for macro-scale operations. In addition, those methods do not have the ability to produce other GRIN optical components with complex refractive index profiles like aspheric or freeform components. We report here an approach to produce GRIN micro-optical components in chalcogenide glass based on a direct laser writing technique. Using this approach, we are able to locally modulate the refractive index of the glass subtrates and create an arbitrary refractive index profile. To prove the flexibility of the method for the production of GRIN micro-optics, we fabricated GRIN micro-lenses and a micro-Fresnel axicon (Fraxicon). The optical properties of micro-lenses can be controlled by varying the writing parameters or the substrate thickness. As a result, the working distance of the micro-lenses can extend from 0 to more than 1000 μm. Also, the micro-Fraxicon exhibits the ability to convert a Gaussian beam to a Bessel-like beam which concentrates the mid-infrared light into an approximately 1200 μm long confinement zone.

Published
2024
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3. Photo-Writable Sulfide Glasses Used to Fabricate Core-Clad Fiber Doped with Pr3+ for Mid-IR Luminescence

Author

Julie Carcreff, Virginie Nazabal, Johann Troles, Catherine Boussard-Plédel, Pascal Masselin, Florent Starecki, Alain Braud, Patrice Camy, and David Le Coq

Subjects
step index sulfide fiber, Pr3+ doped chalcogenide glass, ∆n modification by femtosecond laser, Applied optics. Photonics, TA1501-1820
Abstract

With the ultimate goal of developing rare-earth doped chalcogenide fiber fabrication for sensing, amplification, and laser applications, a core/clad germanium-gallium sulfide fiber doped with Pr3+ has been fabricated. The compositions of the core and the clad were selected to ensure the positive ∆n by adding CdI2 and CsCl, respectively, in the GeS2-Ga2S3 matrix. The choice of these compositions was also justified from experimental parameters, including characteristic temperatures and viscosity. Moreover, the permanent photo writability of the sulfide glass family by a femtosecond laser is investigated from the perspective of Bragg grating photo-inscription. Structural investigations by Raman spectroscopy are presented and the effect of the Pr3+ rare-earth ion on the structure is underlined. Finally, the emission of the step-index fiber, made by the rod-in-tube technique between 3.1 µm and 5.5 µm (by pumping at 1.55 µm), is demonstrated.

Published
2022
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4. Shaping of Looped Miniaturized Chalcogenide Fiber Sensing Heads for Mid-Infrared Sensing

Author

Patrick Houizot, Marie-Laure Anne, Catherine Boussard-Plédel, Olivier Loréal, Hugues Tariel, Jacques Lucas, and Bruno Bureau

Subjects
chalcogenide glass, optical fiber, mid-infrared spectroscopy, sensing head shaping, miniaturization, endoscopy, Chemical technology, TP1-1185
Abstract

Chalcogenide glass fibers are promising photonic tools to develop Fiber Evanescent Wave Spectroscopy (FEWS) optical sensors working in the mid-infrared region. Numerous pioneering works have already been carried out showing their efficiency, especially for bio-medical applications. Nevertheless, this technology remains confined to academic studies at the laboratory scale because chalcogenide glass fibers are difficult to shape to produce reliable, sensitive and compact sensors. In this paper, a new method for designing and fabricating a compact and robust sensing head with a selenide glass fiber is described. Compact looped sensing heads with diameter equal to 2 mm were thus shaped. This represents an outstanding achievement considering the brittleness of such uncoated fibers. FEWS experiments were implemented using alcoholic solutions as target samples showing that the sensitivity is higher than with the routinely used classical fiber. It is also shown that the best compromise in term of sensitivity is to fabricate a sensing head including two full loops. From a mechanical point of view, the breaking loads of the loop shaped head are also much higher than with classical fiber. Finally, this achievement paves the way for the use of mid-infrared technology during in situ and even in vivo medical operations. Indeed, is is now possible to slide a chalcogenide glass fiber in the operating channel of a standard 2.8 mm diameter catheter.

Published
2014
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5. From Selenium- to Tellurium-Based Glass Optical Fibers for Infrared Spectroscopies

Author

Jacques Lucas, Bruno Bureau, Johann Troles, Jean-Louis Doualan, Virginie Nazabal, Catherine Boussard-Plédel, Radwan Chahal, and Shuo Cui

Subjects
selenide glass, telluride glass, optical fiber, infrared spectroscopy, Organic chemistry, QD241-441
Abstract

Chalcogenide glasses are based on sulfur, selenium and tellurium elements, and have been studied for several decades regarding different applications. Among them, selenide glasses exhibit excellent infrared transmission in the 1 to 15 µm region. Due to their good thermo-mechanical properties, these glasses could be easily shaped into optical devices such as lenses and optical fibers. During the past decade of research, selenide glass fibers have been proved to be suitable for infrared sensing in an original spectroscopic method named Fiber Evanescent Wave Spectroscopy (FEWS). FEWS has provided very nice and promising results, for example for medical diagnosis. Then, some sophisticated fibers, also based on selenide glasses, were developed: rare-earth doped fibers and microstructured fibers. In parallel, the study of telluride glasses, which can have transmission up to 28 µm due to its atom heaviness, has been intensified thanks to the DARWIN mission led by the European Space Agency (ESA). The development of telluride glass fiber enables a successful observation of CO2 absorption band located around 15 µm. In this paper we review recent results obtained in the Glass and Ceramics Laboratory at Rennes on the development of selenide to telluride glass optical fibers, and their use for spectroscopy from the mid to the far infrared ranges.

Published
2013
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6. Mid-infrared spectroscopy of serum, a promising non-invasive method to assess prognosis in patients with ascites and cirrhosis.

Author

Maëna Le Corvec, Caroline Jezequel, Valérie Monbet, Nadia Fatih, Frédéric Charpentier, Hugues Tariel, Catherine Boussard-Plédel, Bruno Bureau, Olivier Loréal, Olivier Sire, and Edouard Bardou-Jacquet

Subjects
Medicine, Science
Abstract

Prognostic tests are critical in the management of patients with cirrhosis and ascites. Biological tests or scores perform poorly in that situation. Mid-infrared fibre evanescent wave spectroscopy (MIR-FEWS) which allows for global serum metabolic profiling may provide more relevant information by measuring a wider range of metabolic parameters in serum. Here we present the accuracy of a MIR-FEWS based predictive model for the prognosis of 6 months survival in patients with ascites and cirrhosis.Patients with ascites were prospectively included and followed up for 6 months. MIR-FEWS spectra were measured in serum samples. The most informative spectral variables obtained by MIR-FEWS were selected by FADA algorithm and then used to build the MIR model. Accuracy of this model was assessed by ROC curves and 90%/10% Monte Carlo cross-validation. MIR model accuracy for 6 months survival was compared to that of the Child-Pugh and MELD scores.119 patients were included. The mean age was 57.36±13.70, the MELD score was 16.32±6.26, and the Child-Pugh score was 9.5±1.83. During follow-up, 23 patients died (20%). The MIR model had an AUROC for 6 months mortality of 0.90 (CI95: 0.88-0.91), the MELD 0.77 (CI95: 0.66-0.89) and Child-Pugh 0.76 (CI95: 0.66-0.88). MELD and Child-Pugh AUROCs were significantly lower than that of the MIR model (p = 0.02 and p = 0.02 respectively). Multivariate logistic regression analysis showed that MELD (p

Published
2017
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8. Study of the Ge20Te80-xSex glassy structures by combining solid state NMR, vibrational spectroscopies and DFT modelling

Author

Michaël Deschamps, Virginie Nazabal, Catherine Boussard-Plédel, Eric Furet, Claire Roiland, Bruno Bureau, Claudia Gonçalves, Marc Dussauze, Raphaël Méreau, Institut des Sciences Moléculaires (ISM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université d'Orléans (UO), The authors gratefully acknowledge the financial support of: l’ Agence Nationale de la Recherche for the project IRTeGlass (ANR-14-CE07-0013-03), IDEX Bordeaux (Cluster of Excellence LAPHIA and the allocated grant referred to as ANR-10-IDEX-03-03), and the CNRS project EMERGENCE @INC2019. All IR and Raman experiments have been performed at the platform SIV at University of Bordeaux, funded by the FEDER and the Region Aquitaine., ANR-14-CE07-0013,IRTeGlass,Verres de tellurures en tant que matériaux applicatifs pour l'infrarouge lointain : une approche théorique et spectroscopique(2014), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1 (UB)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Université d'Orléans (UO)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Infrared, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Condensed Matter::Disordered Systems and Neural Networks, Inorganic Chemistry, symbols.namesake, Materials Chemistry, [CHIM]Chemical Sciences, Physical and Theoretical Chemistry, Ternary numeral system, business.industry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, Solid-state nuclear magnetic resonance, chemistry, Chemical physics, Ceramics and Composites, symbols, Photonics, 0210 nano-technology, Tellurium, Raman spectroscopy, business
Abstract

International audience; The glassy ternary system Ge-Te-Se is currently receiving an increased attention due to its extended range of transmission in the infrared opening the way to various potential applications in photonics. In this study, a multi-techniques approach combining solid-state NMR, Raman and infrared spectroscopies and DFT calculations provides insight into the organization of the GeSe4-GeTe4 glassy network and allows to clarify a whole structural description of the glassy system. A particular attention is devoted to the presence of mixed GeTe8-xSex structural units and to the type of interconnections forming the glass networks. Such experimental/theoretical approach is provided both for the selenium and the tellurium rich part of the glassy system.

Published
2021
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9. Changes in the mechanical properties of bioactive borophosphate fiber when immersed in aqueous solutions

Author

Panu Noppari, Laeticia Petit, Jonathan Massera, Catherine Boussard-Plédel, Ayush Mishra, University of Tampere [Finland], Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Academy of FinlandAcademy of Finland [275427], Initial Funding For Research Costs [284492], Flagship Programme, Photonics Research and Innovation [PREIN-320165], 308558, Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Tampere University, BioMediTech, Research group: Biomaterials and Tissue Engineering Group, Physics, and Research group: Photonics Glasses

Subjects
Materials science, Aqueous solution, 02 engineering and technology, [CHIM.MATE]Chemical Sciences/Material chemistry, fibers, mechanical properties, surfaces, 010402 general chemistry, 021001 nanoscience & nanotechnology, Phosphate, 01 natural sciences, Durability, 0104 chemical sciences, chemistry.chemical_compound, chemistry, Glass manufacturing, 216 Materials engineering, durability, General Materials Science, Fiber, Composite material, 0210 nano-technology, glass forming systems, glass manufacturing, phosphate
Abstract

International audience; Bioactive fibers have become increasingly prevalent for applications in optical sensing and as reinforcement in fully biodegradable devices. However, the typical bioactive glass fibers drawn from silicate glasses have poor mechanical properties. Here, we present our latest study on the development of new bioactive single-core (SC) borophosphate fiber with the composition (in mol%) 47.5P(2)O(5)-20CaO-20SrO-10Na(2)O-2.5B(2)O(3) and of core-clad (CC) borophosphate fiber, the composition (in mol%) of the clad and the core being 47.5P(2)O(5)-20CaO-20SrO-10Na(2)O-2.5B(2)O(3) and 0.025CeO(2)-0.975(47.5P(2)O(5)-20CaO-20SrO-10Na(2)O-2.5B(2)O(3)), respectively. We show that the immersion in aqueous solutions such as Tris(hydroxymethyl)aminomethane (TRIS) increases first the mechanical properties of the fibers due to the early congruent glass dissolution and so due to the reduction in the density of surface flaws. However, for long immersion in TRIS or in Simulated Body Fluid (SBF), the mechanical properties decrease due to the precipitation of a reactive calcium-phosphate layer at the surface of the fibers. Especially when immersed for a long time in SBF, the fibers become too fragile to allow one to measure their mechanical properties. Nonetheless, we clearly show in this study that the newly developed fibers are promising materials for reinforcing composite and/or as biosensors as these fibers still possess sufficiently high mechanical properties after immersion for significant time in SBF and/or TRIS.

Published
2020
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10. Effect of P/Bi substitution on optical and thermal properties of Ga-Ge-Se-Te glasses

Author

Bruno Bureau, J. Szlęzak, Catherine Boussard-Plédel, François Cheviré, M.J. Seage, Roman Golovchak, D. Ploch, Ya. Shpotyuk, Austin Peay State University, Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institute of Physics, University of Rzeszow, POLONIUM, Erasmus, Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)

Subjects
Materials science, Kinetics, Analytical chemistry, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, law.invention, DSC, Differential scanning calorimetry, law, Thermal, Materials Chemistry, Thermal stability, Crystallization, Spectroscopy, Optical properties, Mechanical Engineering, Substitution (logic), Metals and Alloys, Isothermal crystallization, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Mechanics of Materials, Chalcogenide glass, 0210 nano-technology
Abstract

International audience; Novel P-containing bulk BixGa5Ge20P10-xSe45Te20 glasses have been successfully fabricated and studied with optical spectroscopy and differential scanning calorimetry. Non-isothermal and isothermal crystallization kinetics are investigated, and anti-Arrhenius behavior is observed for the crystallization of some phases in x = 1 glass. The thermal stability of the glass is shown to decrease with an increase in Bi concentration, whereas as the concentration of P increases, the glass stability increases and the glass does not crystallize during regular DSC heating scans. It is found that substitution of P with Bi in glass composition leads to a decrease in the optical gap and increase in its density.

Published
2020
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11. Mid-infrared detection of organic compounds with a 2-10 µm supercontinuum source generated from concatenated fluoride and chalcogenide fibers (Conference Presentation)

Author

Samuel Poulain, Thibaut Sylvestre, Marcello Meneghetti, Guillaume Huss, Franck Joulain, Catherine Boussard-Plédel, Bruno Bureau, Radwan Chahal, Laurine Bodin, Marcel Poulain, Solenn Cozic, Jean-Luc Adam, Laurent Brilland, Johann Troles, and Sébastien Venck

Subjects
Brightness, Materials science, Infrared, Chalcogenide, business.industry, Mid infrared, Physics::Optics, Astrophysics::Cosmology and Extragalactic Astrophysics, Supercontinuum, chemistry.chemical_compound, chemistry, Optoelectronics, Fiber, business, Spectroscopy, Fluoride, Astrophysics::Galaxy Astrophysics
Abstract

The mid-infrared spectral region is a great technical and scientific interest in numerous research field and applications. Among these studies, the generation of mid-infrared supercontinuum in fibers has attracted strong interest in the last decade, because of unique properties such as broad wavelength-coverage and brightness. In this work, a cascaded supercontinuum generated in a fluoride and a chalcogenide fiber spanning from 2 to 10 µm has been used for the detection of infrared signatures of organic compounds. Those results open a new way for remote sensing and spectroscopy in the mid-IR.

Published
2020
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12. Glasses to see beyond visible

Author

Catherine Boussard-Plédel, Johann Troles, Bruno Bureau, Marcel Poulain, Xianghua Zhang, and Jacques Lucas

Subjects
Engineering, Infrared, business.industry, General Chemical Engineering, media_common.quotation_subject, 02 engineering and technology, General Chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Engineering physics, 010309 optics, Originality, 0103 physical sciences, 0210 nano-technology, business, media_common
Abstract

Glasses transmitting in the infrared (IR) belong to the families of fluorides and chalcogenides. This brief review is dealing with the originality of these materials such as their glass-forming properties. This contribution is essentially oriented towards their applications, which are illustrated by the creation of four companies. They have found niches in the business of IR, in bringing to the market original fibres and lenses in the growing sectors of IR cameras as well as sensors for medicine, astronomy and biological applications.

Published
2018
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13. Optical and thermal properties of Sb/Bi-modified mixed Ge-Ga-Se-Te glasses

Author

Andrzej Kozdras, Ya. Shpotyuk, J. Szlęzak, Catherine Boussard-Plédel, Bruno Bureau, T. Hodge, Roman Golovchak, Austin Peay State University, University of Technology (Opole), Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Rzeszow University of Technology, DMR-1409160, NSF, National Stroke Foundation, Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Thermodynamics, 02 engineering and technology, Activation energy, 01 natural sciences, DSC, law.invention, Crystallization kinetics, Differential scanning calorimetry, law, 0103 physical sciences, Thermal, Materials Chemistry, [CHIM]Chemical Sciences, Thermal stability, Crystallization, 010306 general physics, Optical properties, Mechanical Engineering, Metals and Alloys, 021001 nanoscience & nanotechnology, Kinetics, Mechanics of Materials, Chalcogenide glass, Exponent, 0210 nano-technology
Abstract

International audience; The non-isothermal crystallization kinetics of novel BixGa5Ge20Sb10-xSe45Te20 (x = 1,3,5,10) glasses are studied with differential scanning calorimetry method, and analyzed using Frazer-Suzuki fitting function. The applicability of Johnson-Mehl-Avrami (JMA) model to describe the crystallization kinetics in these materials is verified, and JMA exponent is determined for the relevant crystallization processes. It is found, that substitution of Sb with Bi in glass composition leads to a decrease in optical gap and thermal stability of the glass, and increase in the density and crystallization activation energy for glass-ceramics formation.

Published
2018
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14. Possible Mechanism for Hole Conductivity in Cu–As–Te Thermoelectric Glasses: A XANES and EXAFS Study

Author

Carmelo Prestipino, A. Trapananti, Catherine Boussard-Plédel, Sergio Di Matteo, Bruno Bureau, Shuo Cui, Soraya Ababou-Girard, Bhuvanesh Srinivasan, Alain Gellé, Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Verres et Céramiques, CNR Istituto Officina dei Materiali (IOM), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Università degli Studi di Perugia = University of Perugia (UNIPG), European Commission's Horizon research and innovation programs under Marie Sklodowska-Curie ITN actions CoACH [642557], European Commission's Horizon research and innovation programs under Marie Sklodowska-Curie ITN actions GlaCERCo [264526], Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Consiglio Nazionale delle Ricerche [Roma] (CNR), and Università degli Studi di Perugia (UNIPG)

Subjects
Materials science, Absorption spectroscopy, 02 engineering and technology, Conductivity, 010402 general chemistry, 7. Clean energy, 01 natural sciences, Condensed Matter::Materials Science, Electrical resistivity and conductivity, Thermoelectric effect, Physical and Theoretical Chemistry, Lone pair, Valence (chemistry), Quantitative Biology::Neurons and Cognition, Extended X-ray absorption fine structure, Condensed matter physics, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, XANES, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Crystallography, General Energy, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], 0210 nano-technology
Abstract

International audience; Recently synthesized thermoelectric Cu-As-Te glasses have been analyzed by X-ray Absorption Spectroscopy, both near-edge (XANES) and in the extended region (EXAFS), in order to shed light on the mechanism at the basis of the huge increase of conductivity, up to five orders of magnitude, that was found with Cu doping. Experimental data have been modeled by means of multiple-scattering calculations. Our model suggests that the experimental results can be interpreted in terms of a small charge-transfer from Te to Cu, leading to an unexpected positive valence for Te. Interestingly, on the basis of these findings, a global picture explaining the enhancement of electrical conductivity with Cu doping can be proposed: electrical conductivity is determined by the holes created in non-bonding Te 5p orbitals (lone pair) by Cu 2 acceptors. The critical parameter to increase electrical conductivity is the number of CuTe bonds that are formed and not simply the number of Cu atoms.

Published
2017
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15. Dy3+ doped GaGeSbSe fiber long-wave infrared emission

Author

Julien Ari, Florent Starecki, Geoffrey Louvet, Radwan Chahal, Virginie Nazabal, Catherine Boussard-Plédel, Patrice Camy, Alain Braud, I. Hafienne, J.L. Doualan, Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Université Laval [Québec] (ULaval), Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Agence Nationale de la Recherche, ANR ANR-15-CE39-0007, ANR-15-CE39-0007,OPTIGAS,Capteur tout optique infrarouge pour gaz dangereux(2015), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Rennes-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes-Centre National de la Recherche Scientifique (CNRS)

Subjects
optical fiber, Materials science, Optical fiber, Chalcogenide glasses, Chalcogenide, Infrared, rare earth, Biophysics, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Biochemistry, law.invention, Optical pumping, chemistry.chemical_compound, law, [CHIM]Chemical Sciences, ComputingMilieux_MISCELLANEOUS, Diode, business.industry, Doping, General Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Laser, Atomic and Molecular Physics, and Optics, 0104 chemical sciences, chemistry, infrared, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Optoelectronics, 0210 nano-technology, business, Luminescence
Abstract

International audience; We report on the mid-wave infrared (MWIR) and long-wave infrared (LWIR) emissions of a 1000 ppm Dy 3+ doped Ga 5 Ge 20 Sb 10 Se 65 chalcogenide fiber. Following a shortwave infrared (SWIR) optical pumping at 0.92, 1.12 and 1.32 µm using commercial laser diodes, LWIR luminescence around 7.3 µm (6 H 7/2 → 6 H 9/2 transition) was recorded for the first time to the best of our knowledge along with MWIR emissions around 4.3 µm and 5.4 µm with a Dy 3+ doped Ga 5 Ge 20 Sb 10 Se 65 fiber. Frequency dependent spectroscopic investigation clearly shows that this LWIR luminescence originates from the 6 H 7/2 manifold. Spectroscopic properties of this Dy 3+ doped material and the comparison with its equivalent sulfide Dy 3+ :Ga 5 Ge 20 Sb 10 S 65 glass are presented.

Published
2020
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16. Effect of high-energy mechanical milling on the medium-range ordering in glassy As-Se

Author

Zdenka Bujňáková, Pavlo Demchenko, Oleh Shpotyuk, Catherine Boussard-Plédel, Peter Baláž, Bruno Bureau, Yaroslav Shpotyuk, Ivan Franko National University of Lviv, Rzeszow University of Technology, Slovak Academy of Science [Bratislava] (SAS), Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Jan Dlugosz University in Czestochowa, Vlokh Institute of Physical Optics, APVV‐18‐0357, Agentúra na Podporu Výskumu a Vývoja, Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
High energy, Materials science, Mechanical milling, medium-range ordering, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, high-energy mechanical milling, arsenoselenide glasses, Medium range, X-ray powder diffraction, 0103 physical sciences, Materials Chemistry, Ceramics and Composites, intermediate-range ordering, [CHIM]Chemical Sciences, Composite material, 010306 general physics, 0210 nano-technology
Abstract

International audience; Effect of high-energy mechanical milling on glassy AsxSe100 - x (5

Published
2020
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17. Chalcogenide fibers for infrared sensing

Author

Catherine Boussard-Plédel, Bruno Bureau, Claire Fourmentin, David Le Coq, and Shuo Cui

Subjects
chemistry.chemical_compound, Thesaurus (information retrieval), Information retrieval, chemistry, Chalcogenide, Infrared, Computer science
Published
2019
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18. All-optical carbon dioxide remote sensing using rare earth doped chalcogenide fibers

Author

Julien Ari, Jean-Louis Doualan, Catherine Boussard-Plédel, Alain Braud, Florent Starecki, Karine Michel, Virginie Nazabal, Patrice Camy, Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Bureau de Recherches Géologiques et Minières (BRGM) (BRGM), Agence de l'Environnement et de la Maîtrise de l'Energie, Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)

Subjects
Wavelength conversion, Materials science, Infrared, Chalcogenide, Phonon, Physics::Optics, 02 engineering and technology, 7. Clean energy, 01 natural sciences, MWIR sources, Ion, 010309 optics, chemistry.chemical_compound, 0103 physical sciences, Rare earth, [CHIM]Chemical Sciences, Fiber, Electrical and Electronic Engineering, Absorption (electromagnetic radiation), Astrophysics::Galaxy Astrophysics, ComputingMilieux_MISCELLANEOUS, CO2 detection, business.industry, Mechanical Engineering, Detector, Doping, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, chemistry, Optoelectronics, Astrophysics::Earth and Planetary Astrophysics, 0210 nano-technology, business, Chalcogenide fibers
Abstract

As many fundamental spectroscopic signatures associated to gases of interest are in the 2.5 – 15 µm spectral range (4000–350 cm−1), gases can be detected using efficient infrared (IR) emissions from rare earth (RE) ions embedded into chalcogenide glasses, which are well-known for having low phonon energies. An all-optical IR fiber sensor for in-situ carbon dioxide monitoring was developed. The 4.3 µm mid-IR source probing the gas absorption in this sensor is a Dy3+ doped GaGeSbS fluorescent chalcogenide fiber. Following the 4.3 µm partial absorption by CO2, a wavelength conversion from 4.3 µm to 808 nm is implemented using excited state absorption (ESA) mechanisms in Er3+ doped GaGeSbS bulk glasses or fibers. This wavelength conversion allows the use of silica fibers to transport the 808 nm converted signal. This all-optical sensor with a sensitivity of few hundreds of ppm can be typically deployed over the kilometer range, making this tool suitable for field operations. The photon conversion principle used in this gas sensor could be implemented as a general mean to detect infrared radiations using visible or near-IR detectors instead of mid-infrared detectors.

Published
2019
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19. MWIR and LWIR Emissions of Rare Earth Doped Chalcogenide Glasses and Waveguides Devoted to Optical Sensors

Author

Geoffrey Louvet, Nora Abdellaoui, Julien Ari, Emeline Baudet, Florent Starecki, Catherine Boussard-Plédel, Joel CHARRIER, Loïc Bodiou, Alain Braud, Jean-Louis Doualan, Patrice Camy, Petr Němec, Karine Michel, Lionel Quétel, Bruno Bureau, Jean-Luc Adam, Virginie Nazabal, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), University of Pardubice, Institut des Fonctions Optiques pour les Technologies de l'informatiON (Institut FOTON), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Bureau de Recherches Géologiques et Minières (BRGM) (BRGM), IDIL Fibres Optiques, PME, Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Centre National de la Recherche Scientifique (CNRS), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), and Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS]Physics [physics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

20. Long-Wave IR Luminescence of Tb3+ and Sm3+ doped Ga5Ge20Sb10Se65 Fibers

Author

Alain Braud, Virginie Nazabal, Jean-Louis Doualan, Nora Abdellaoui, Bruno Bureau, Catherine Boussard-Plédel, Florent Starecki, and Patrice Camy

Subjects
Materials science, Optical fiber, Infrared, Chalcogenide, Doping, Analytical chemistry, chemistry.chemical_element, Germanium, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, law.invention, 010309 optics, chemistry.chemical_compound, chemistry, law, Selenide, 0103 physical sciences, 0210 nano-technology, Luminescence, Absorption (electromagnetic radiation)
Abstract

Chalcogenide glasses transparency properties and their use for various applications in the Mid-Wave InfraRed (MWIR, 3–5 μm) and Long-Wave IR (LWIR, 8–12 μm) spectral domains are well-known. Specific chalcogenide glasses composition can be advantageously doped with rare-earth (RE) ions and because of their low phonon energy they are likely to provide infrared luminescence from the RE low lying manifolds. We present here for the first time to the best of our knowledge, the RE luminescence in the LWIR domain of Sm3+ and Tb3+ ions in a selenide-based glass (Ga 5 Ge 20 Sb 10 Se 65 ). 500 ppm and 1000 ppm Sm3+ and Tb3+ doped Ga 5 Ge 20 Sb 10 Se 65 optical fibers of high purity and optical quality were elaborated from conventional methods. Absorption and emission properties of the low-lying Sm3+ and Tb3+ manifolds in this low-phonon energy glass host were investigated in details (Fig. 1). In the case of Sm3+, the low-lying manifolds emissions in the LWIR domain could potentially result in a four-level laser operation in the 6–8 μm region. The Tb3+ ion lower manifolds (7F 0→6 ) also offer potential mid-IR transitions in this glass.

Published
2019
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21. Fabrication and Characterization of New Phosphate Glasses and Glass-Ceramics Suitable for Drawing Optical and Biophotonic Libers

Author

Davide Janner, N. Ojha, Nadia Giovanna Boetti, Laeticia Petit, Pablo Lopez-Iscoa, Jonathan Massera, Diego Pugliese, Daniel Milanese, Regina Gumenyuk, and Catherine Boussard-Plédel

Subjects
phosphate glass, phosphate glass ceramics, optical fiber, biophotonics, Materials science, Optical fiber, Fabrication, business.industry, Doping, Condensed Matter::Disordered Systems and Neural Networks, law.invention, Characterization (materials science), Phosphate glass, law, Phase (matter), visual_art, visual_art.visual_art_medium, Optoelectronics, Thermal stability, Ceramic, business
Abstract

Rare earth doped phosphate glasses are attractive materials for the engineering of photonic devices, due to their easy processing, good thermal stability, excellent optical properties and high rare-earth ions solubility [1]. Besides, phosphate glasses with a P 2 O 5 content of 50 mol% have been shown to be suitable for fiber drawing. It is well known that if the rare-earth ions are located in crystalline phase of desired nature and structure, the spectroscopic properties of the glasses can be enhanced [2]. Therefore, efforts have been focused on the development of new glass-ceramics (GCS) obtained from the heat treatment of glasses, as these engineered materials possess some of the glass properties (large flexibility of composition and geometry) but also some advantages of the RE-doped single crystals (high absorption and emission as well as long lifetimes).

Published
2019
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22. Free-volume structure of polyvinylpyrrolidone-capped glassy As 2 Se 3 nanocomposites prepared by mechanical milling

Author

Peter Baláž, Yaroslav Shpotyuk, Mariusz Woźny, Oleh Shpotyuk, Bruno Bureau, Adam Ingram, Catherine Boussard-Plédel, D. P. Slobodzyan, Zdenka Bujňáková, Jan Dlugosz University in Czestochowa, Opole University of Technology, University of Technology (Opole), Slovak Academy of Sciences (SAS), Ivan Franko National University of Lviv, Rzeszow University of Technology, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Polymers and Plastics, Plastic products, Volume elements, Mechanical milling, Electrons, 02 engineering and technology, Water solutions, 010402 general chemistry, 01 natural sciences, Selenium compounds, Nanocomposites, High-energy mechanical milling, Polyvinyl pyrrolidone, Positrons, Decomposition algorithm, Materials Chemistry, medicine, [CHIM]Chemical Sciences, ComputingMilieux_MISCELLANEOUS, Positron lifetime, Nanocomposite, Polyvinylpyrrolidone, General Chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Positron annihilation lifetime spectroscopy, Chemical engineering, Volume (thermodynamics), Free volume, Glass, Mechanical alloying, 0210 nano-technology, Milling (machining), medicine.drug
Abstract

International audience

Published
2019
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23. Extended aging of Ge–Se glasses below the glass transition temperature

Author

Jean-Pierre Guin, Pierre Lucas, Wataru Takeda, Sabyasachi Sen, Catherine Boussard-Plédel, Bruno Bureau, Ellyn A. King, University of Arizona, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Corning [USA], University of California [Davis] (UC Davis), University of California, Institut de Physique de Rennes (IPR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), NSF-DMR National Science Foundation (NSF) [1832817], Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), University of California (UC), and Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS]Physics [physics], Materials science, Enthalpy, Configuration entropy, General Physics and Astronomy, Thermodynamics, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter::Disordered Systems and Neural Networks, 01 natural sciences, Heat capacity, chemistry.chemical_compound, symbols.namesake, Differential scanning calorimetry, Germanium selenide, chemistry, 0103 physical sciences, symbols, Relaxation (physics), Physical and Theoretical Chemistry, 010306 general physics, 0210 nano-technology, Glass transition, Raman spectroscopy
Abstract

International audience; Germanium selenide glasses of compositions spanning the whole glass-formation range are aged at room temperature for up to 20 years. A prominent enthalpy relaxation process is observed in all glasses, and its structural origin is analyzed by Raman spectroscopy. The structural relaxation is manifested in the Raman spectra as a decrease in the ratio of edge- to corner-sharing GeSe4/2 tetrahedral units. This structural evolution can be explained in terms of configurational entropy and density changes. Changes in Raman features and enthalpy follow an identical stretched exponential relaxation function characteristic of aging in glasses. The compositional dependence of enthalpy relaxation after 20 years is in agreement with kinetic considerations based on the glass transition temperature of each glass. The relaxation behavior and heat capacity curves are consistent with standard glass relaxation models for all compositions. These results indicate that the non-reversing enthalpy obtained by modulated differential scanning calorimetry (MDSC), which suggests the existence of non-aging glasses, is not a reliable measure of the ability of a glass to relax. Instead, it is suggested that an interpretation of MDSC data in terms of complex heat capacity provides a more complete and reliable assessment of the relaxation properties of glasses.

Published
2021
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24. Structural and chemical homogeneity of chalcogenide glass prepared by melt-rocking

Author

Garrett J. Coleman, Laurent Calvez, Johann Troles, Bruno Bureau, Catherine Boussard-Plédel, Sabyasachi Sen, Shuo Cui, Yann Guimond, Pierre Lucas, University of Arizona, University of California [Davis] (UC Davis), University of California, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), NSF-DMR [1832817], University of California (UC), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Length scale, Materials science, 010304 chemical physics, Energy-dispersive X-ray spectroscopy, General Physics and Astronomy, Chalcogenide glass, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 01 natural sciences, Homogenization (chemistry), 0104 chemical sciences, chemistry.chemical_compound, symbols.namesake, Germanium selenide, chemistry, Selenide, 0103 physical sciences, Homogeneity (physics), symbols, Physical and Theoretical Chemistry, Composite material, Raman spectroscopy, ComputingMilieux_MISCELLANEOUS
Abstract

The chemical and structural homogeneity of selenide glasses produced by mechanical homogenization of the melt in a rocking furnace is investigated by Raman and Energy Dispersive Spectroscopy (EDS). Both techniques demonstrate that the glass is macroscopically homogeneous along the entire length of a 6 cm rod. EDS imaging performed over four orders of magnitude in scale further confirms that the glass is homogeneous down to the sub-micron scale. An estimate of the diffusion coefficient from experimental viscosity data shows that the diffusion length is far larger than the resolution of EDS and therefore confirms that the glass is homogeneous at any length scale. In order to investigate a systematic mismatch in physical properties reported in the literature for glasses produced by extended static homogenization, two germanium selenide samples are produced under the same conditions except for the homogenization step: one in a rocking furnace for 10 h and the other in a static furnace for 192 h. No difference in physical properties is found between the two glasses. The properties of an ultra-high purity glass are also found to be identical. The origin of the systematic deviation reported in the literature for germanium selenide glasses is therefore still unknown, but the present results demonstrate that homogeneity or dryness does not have a significant contribution in contrast to previous suggestions. The implications of glass homogeneity for technological applications and industrial production are discussed.

Published
2019
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25. Realizing a stable high thermoelectric zT ∼ 2 over a broad temperature range in Ge 1−x−y Ga x Sb y Te via band engineering and hybrid flash-SPS processing

Author

Catherine Boussard-Plédel, Jean-François Halet, Michael J. Reece, Bruno Bureau, Francesco Gucci, Bhuvanesh Srinivasan, Régis Gautier, Alain Gellé, Bruno Fontaine, Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Queen Mary University of London (QMUL), Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), 642557 (CoACH-ETN), H2020 Marie Skłodowska-Curie Actions, European Project: 642557,H2020,H2020-MSCA-ITN-2014,CoACH(2015), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Université de Rennes 1 (UR1), and Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS]Physics [physics], Materials science, Fermi level, Analytical chemistry, Sintering, 02 engineering and technology, Plasma, Atmospheric temperature range, [CHIM.INOR]Chemical Sciences/Inorganic chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 7. Clean energy, 01 natural sciences, 0104 chemical sciences, Inorganic Chemistry, symbols.namesake, Thermal conductivity, Effective mass (solid-state physics), Seebeck coefficient, Thermoelectric effect, symbols, 0210 nano-technology
Abstract

International audience; We report a remarkably high and stable thermoelectric figure of merit zT close to 2 by manipulating the electronic bands in Ga–Sb codoped GeTe, which has been processed by hybrid flash-spark plasma sintering. According to the experimental results and first-principles calculations, the vast enhancement achieved in the thermopower due to codoping of Ga (2 mol%) and Sb (8 mol%) in GeTe is attributed to a concoction of reasons: (i) suppression of hole concentration; (ii) improved band convergence by decreasing the energy separation between the two valence band maxima to 0.026 eV; (iii) Ga predominantly contributing to the top of the valence band in Ga–Sb codoped GeTe, despite the Ga-induced resonance state not being located at a favorable position near the Fermi level; (iv) active participation of several bands increasing the hole carrier effective mass; (v) facilitating band degeneracy by reducing the R3m → Fm[3 with combining macron]m structural transition temperature from 700 K to 580 K. The synergy between these complementary and beneficial effects, in addition to the reduced thermal conductivity, enabled the flash sintered Ge0.90Ga0.02Sb0.08Te composition to not only exhibit a peak of zT of ∼1.95 at 723 K, but also to maintain/stabilize its high performance over a broad temperature range (600–775 K), thus making it a serious candidate for mid-temperature range energy harvesting devices.

Published
2019
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26. Design, processing, and characterization of an optical core-bioactive clad phosphate fiber for biomedical applications

Author

Nadia Giovanna Boetti, Davide Janner, Ayush Mishra, Pablo Lopez-Iscoa, Jonathan Massera, Daniel Milanese, Bruno Bureau, Laeticia Petit, Johann Troles, Regina Gumenyuk, N. Ojha, Catherine Boussard-Plédel, Diego Pugliese, Politecnico di Torino = Polytechnic of Turin (Polito), Tampere University of Technology [Tampere] (TUT), Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Università degli studi di Parma = University of Parma (UNIPR), 275427, Luonnontieteiden ja Tekniikan Tutkimuksen Toimikunta, Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), and University of Parma = Università degli studi di Parma [Parme, Italie]

Subjects
optical fiber, Optical fiber, Materials science, bioactivity, Er luminescence property, phosphate glass, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Phosphate glass, law.invention, chemistry.chemical_compound, law, Materials Chemistry, [CHIM]Chemical Sciences, Fiber, Composite material, ComputingMilieux_MISCELLANEOUS, 021001 nanoscience & nanotechnology, Phosphate, 0104 chemical sciences, Characterization (materials science), Core (optical fiber), chemistry, Ceramics and Composites, 0210 nano-technology
Abstract

International audience

Published
2019
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27. 7 to 8 µm emission from Sm

Author

Florent, Starecki, Alain, Braud, Nora, Abdellaoui, Jean-Louis, Doualan, Catherine, Boussard-Plédel, Bruno, Bureau, Patrice, Camy, and Virginie, Nazabal

Abstract

We report on the observation of the long wave-infrared (LWIR) emission centered at 7.3 µm of Sm

Published
2018

28. Infrared emissions around 8µm in rare-earth doped chalcogenide fibers

Author

Catherine Boussard-Plédel, Jean-Louis Doualan, Virginie Nazabal, Alain Braud, Patrice Camy, Florent Starecki, Nora Abdellaoui, Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)

Subjects
Solid state lasers, Materials science, Absorption spectroscopy, Infrared, Chalcogenide, Rare earth, 02 engineering and technology, Rare earth-doped fibers, Optical pumping, Emission band, chemistry.chemical_compound, 020210 optoelectronics & photonics, Rare earths, Longwave infrared, 0202 electrical engineering, electronic engineering, information engineering, [CHIM]Chemical Sciences, Optical fibers, Infrared radiation, business.industry, Infrared emissions, Doping, Emission bands, 021001 nanoscience & nanotechnology, chemistry, Maximum emissions, Optoelectronics, 0210 nano-technology, business, Rare earth doped, Chalcogenide fibers, Chalcogenides
Abstract

International audience; The long wave-infrared (LWIR) emission around 8µm of Sm3+ and Tb3+ doped chalcogenide fibers is reported. These rare-earth doped fibers exhibit a significant emission band from 6.5 to 8.5µm with a maximum emission around 7.3 µm with the Sm3+ doping while the Tb3+ emission is centered at 8µm. © OSA 2018.

Published
2018
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29. Free-volume structure of glass-As2Se3/PVP nanocomposites prepared by mechanochemical milling

Author

Catherine Boussard-Plédel, Bruno Bureau, Peter Baláž, Oleh Shpotyuk, Adam Ingram, Zdenka Bujňáková, Yaroslav Shpotyuk, Jan Dlugosz University in Czestochowa, Opole University of Technology, University of Technology (Opole), Ivan Franko National University of Lviv, Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Acierno D.Grassia L.D'Amore A. (eds), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)

Subjects
Void (astronomy), Materials science, Nanocomposite, Polyvinylpyrrolidone, mechanical milling, nanocomposite, 020502 materials, nanoparticle, positron annihilation, free-volume defect, 02 engineering and technology, Trapping, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, arsenic selenide, Formalism (philosophy of mathematics), Positron, 0205 materials engineering, Chemical engineering, medicine, [CHIM]Chemical Sciences, 0210 nano-technology, Spectroscopy, medicine.drug, Positron annihilation
Abstract

International audience; Atomic-deficient void structure is studied in nanocomposites prepared by mechanochemical milling of glassy g-As2Se3 in a water solution of polyvinylpyrrolidone (PVP) employing positron annihilation lifetime spectroscopy. Formalism of Ps-to-positron trapping conversion known as x3-x2-CDA (coupling decomposition algorithm) is applied to identify free-volume defects in the pelletized g-As2Se3/PVP nanocomposite in respect to dry-milled g-As2Se3 one. Under wet-milling, the inter-nanoparticle Ps-decaying sites in preferential PVP environment replace free-volume positron traps (in dry-milled g-As2Se3) with defect-specific lifetime of 0.352 ns, corresponding to di-/tri-atomic vacancies in g-As-Se. © 2018 Author(s).

Published
2018
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30. MWIR emissions from 3.1 to 8 µm of Tb3+ doped seleno-telluride fibers (Conference Presentation)

Author

Jean-Louis Doualan, Catherine Boussard-Plédel, Florent Starecki, Patrice Camy, Bureau Bruno, Alain Braud, Nora Abdellaoui, Virginie Nazabal, and Petr Nemec

Subjects
Materials science, business.industry, Chalcogenide, Chalcogenide glass, chemistry.chemical_element, chemistry.chemical_compound, Far infrared, chemistry, Absorption band, Telluride, Selenide, Optoelectronics, Luminescence, business, Tellurium
Abstract

Chalcogenide glasses appear as good candidates to build all optical gas sensors due to their wide infrared transparency and the possibility of incorporate rare earth active in MWIR spectral range. To detect and quantify gases, one way is to develop chalcogenide glasses presenting transparency compatible with the molecules absorption band frequency. Two domains of interest can be distinguished: MWIR and LWIR corresponding respectively to the 3–5 μm and 8–12 μm spectral ranges. Selenide and sulfide based chalcogenide glasses are known for their excellent infrared transmission properties in the 1-15 µm region with good thermo-mechanical properties. Doped with Dy3+or Pr3+, sulfide glass fibers have been used as MWIR source for gas sensor for CO2 detection. To probe the far infrared beyond 12 µm, telluride chalcogenide glasses appear as a very interesting material due to it low phonon energy and a broad transparency (up to 25 µm). While these attractive optical properties of telluride glasses, particularly for LWIR, there is few study about rare earth incorporation for luminescence explained a challenging synthesis process avoiding crystallization. To get more stability in the glass state it is essential to add selenium. Thus for each system, it is required to determine the best compromise between the transparency domain and the glass state stability by playing on the ratio between selenium and tellurium atoms. Regarding the energy level of Tb3+, we can expect to have a radiative emission from 3.1 µm up to 8 µm. For gas sensor application, it is a range of interest regarding the LWIR absorption band of some hazardous gases. Thus, Tb3+ doped chalcogenide glasses with nominal composition of Ga5Ge20Sb10Se(65-x)Tex (x = 0, 10, 20, 25, 30, 32.5, 35, 37.5) were synthetized. Their physico-chemical properties (chemical composition, density, thermal characteristics) and optical properties (transmission and ellipsometry spectroscopies) are clearly modified by tellurium substitution to selenium. Based on a detailed study of the Ga5Ge20Sb10Se(65-x)Tex bulk glass and fiber properties, the optimal composition of seleno-telluride glass fiber was found to be Ga5Ge20Sb10Se45Te20. The luminescence properties of Tb3+ (500, 1000 and 1500 ppm) doped Ga5Ge20Sb10Se65 and Ga5Ge20Sb10Se45Te20 were studied in glass bulk and fiber samples. Radiative transitions calculated from Judd-Ofelt (J-O) theory were compared to the experimental values. Although an expected lower phonon energy for telluride glasses, selenide glasses stay more suitable for MWIR emission with a strong emission at 4.8 and 3.1 µm. The emission at 8 µm was successfully observed with careful luminescence investigations.

Published
2018
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31. 8 μm luminescence from a Tb

Author

Florent, Starecki, Nora, Abdellaoui, Alain, Braud, Jean-Louis, Doualan, Catherine, Boussard-Plédel, Bruno, Bureau, Patrice, Camy, and Virginie, Nazabal

Abstract

In this Letter, we report for the first time, to the best of our knowledge, on an emission at 8 μm from Tb

Published
2018

32. Electrical and optical investigations in Te–Ge–Ag and Te–Ge–AgI chalcogenide glasses

Author

Bruno Bureau, Shuo Cui, Catherine Boussard-Plédel, D. Le Coq, Department of Materials Science and Engineering, Zhejiang University, Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Financial support from European Community’s Seventh Framework Programme through Marie-Curie Action: 'Initial Training Networks' (GlaCERCo GA 264526) is gratefully acknowledged. The authors are also very grateful to Prof. E. Bychkov and Prof. T. Usuki for useful discussions., European Project: 264526,EC:FP7:PEOPLE,FP7-PEOPLE-2010-ITN,GLACERCO(2011), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)

Subjects
Materials science, Chalcogenide glasses, Chalcogenide, Band gap, Mechanical Engineering, Metals and Alloys, Analytical chemistry, Impedance spectroscopy, Mineralogy, [CHIM.MATE]Chemical Sciences/Material chemistry, Activation energy, Conductivity, Dielectric spectroscopy, chemistry.chemical_compound, chemistry, Mechanics of Materials, Electrical resistivity and conductivity, Electrical conductivity, Materials Chemistry, Turning point, Electrical conductor
Abstract

(GeTe 4 ) 100− x Ag x and (GeTe 4 ) 100− x (AgI) x glasses were prepared by a melting-quenching method. The glass electrical conductivity was investigated by both electrochemical impedance spectroscopy at different temperatures from 283 K to 333 K and four-probe method at room temperature (293 K). Meanwhile, as a major factor determining the electrical conductivity of a solid, optical band gap was also studied. By comparing the electrical conductivity values and glass optical band gap evolution, it was found that (GeTe 4 ) 100− x Ag x glasses are mainly electronic conductive. On the other hand, the electrical conductivities of (GeTe 4 ) 100− x (AgI) x glasses firstly show a monotonic decrease by increasing AgI up to 15 mol.%, and then an increase when the AgI content is higher than 15 mol.%. The activation energy E a and the pre-exponential factor σ 0 show apparent turning point when AgI content is 15 mol.%, signifying a conductivity mechanism change. In this paper, correlations between the conductivity and hypothetical structures in (GeTe 4 ) 100− x Ag x and (GeTe 4 ) 100− x (AgI) x glasses are done and the importance of the Ag role is underlined.

Published
2015
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33. Effect of physical aging on fracture behavior of Te2As3Se5 glass fibers

Author

Jean-Christophe Sangleboeuf, Catherine Boussard-Plédel, Hongfei Chen, Guang Yang, Bruno Bureau, School of Materials & Engineering, Shangai-Tongji University, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Institut de Physique de Rennes (IPR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS]Physics [physics], Materials science, Physical aging, Process Chemistry and Technology, Glass fiber, Chalcogenide glass, shape factor, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, chalcogenide glass, Fracture, Ultimate tensile strength, Materials Chemistry, Ceramics and Composites, Fracture (geology), C fracture, Composite material, Shape factor, glass fiber
Abstract

International audience; Fracture surface characteristics of Te 2 As 3 Se 5 (TAS) glass fibers aged in light and in dark have been investigated respectively for understanding physical aging effect on their fracture behavior. The properties including tensile strength (ı), surface flaw depth (Į), and mirror radii (r m) were measured by DY30 Adamel Lomarghy and SEM respectively. Shape factor extracted by fitting of ı vs Į confirms that fractures of fibers aged in dark for 4 months originate from their surface flaw, but it does not work for fibers aged in light for 4 months. However, mirror constants (=ır m 1/2) of fracture surface for the TAS glass fibers aged in dark are in a good agreement with those aged in light. One possible reason is that the photoinduced effect changes the structure of glass surface during the physical aging.

Published
2015
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34. Infrared sulfide fibers for all-optical gas detection

Author

Jean-Louis Doualan, R. Chahal, Florent Starecki, J. Ari, Karine Michel, Bruno Bureau, Catherine Boussard-Plédel, Patrice Camy, Virginie Nazabal, Alain Braud, A.L. Pelé, Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Bureau de Recherches Géologiques et Minières (BRGM) (BRGM), Digonnet M.J.F.Jiang S., Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)

Subjects
Optical fiber, Materials science, Chalcogenide glasses, Infrared, Phonon, Chalcogenide, 02 engineering and technology, 01 natural sciences, Signal, law.invention, 010309 optics, chemistry.chemical_compound, law, 0103 physical sciences, [CHIM]Chemical Sciences, Rare-earth, Astrophysics::Galaxy Astrophysics, business.industry, Sensors, Doping, Detector, 021001 nanoscience & nanotechnology, chemistry, Carbon dioxide, Optoelectronics, Astrophysics::Earth and Planetary Astrophysics, 0210 nano-technology, business, Methane, Visible spectrum
Abstract

International audience; A review of our work on all-optical gas sensors is presented with an emphasis on the development of both new infrared (IR) sources and IR to visible converters. Many radicals spectroscopic signatures associated to gases of interest are in the 2.5 -15 μm spectral range (4000-350 cm-1). This spectral domain matches rare-earth ions emissions when embedded into chalcogenide glasses which are well- known for having low phonon energies. We present here results concerning the development of IR sources and IR to visible converters based on rare earth doped chalcogenide fibers. The development of all-optical gas sensors in the 3 to 5 μm spectral range is described showing IR signal conversion into visible light using specific excited state absorption mechanisms in rare earth doped materials. This wavelength conversion enables the use of silica fibers to transport the "gas" signal over large distances considerably increasing the scope of possible applications. An example of all-optical sensor using this photon conversion is presented in the case of CO2 detection. The implementation of this type of sensor for different gases such as methane is finally discussed. This all-optical sensor can be typically used over a kilometer range, with sensitivity around hundreds of ppm with cost effective detection heads, making this tool suitable for field operations. Finally, the photon conversion at the heart of this all-optical sensor is discussed as a general mean to detect infrared radiations avoiding the use of infrared detectors for a large span of applications. © 2018 SPIE.

Published
2018
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35. Ultraflexible Glassy Semiconductor Fibers for Thermal Sensing and Positioning

Author

Jing Zhang, Bruno Bureau, Kaiwei Li, Zhixun Wang, Lei Wei, Catherine Boussard-Plédel, Bhuvanesh Srinivasan, Ting Zhang, Johann Troles, Zhe Wang, Nanyang Technological University [Singapour], Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), This work is supported in part by the Singapore Ministry of Education Academic Research Fund Tier 2 (MOE2015-T2-1-066 and MOE2015-T2-2-010), Singapore Ministry of Education Academic Research Fund Tier 1 (RG85/16), and Nanyang Technological University (Start-up Grant M4081515: L.W.). Authors from Rennes acknowledges the European Commission’s H2020-MSCA grant (GA. 642557, CoACH-ETN), European Project: 642557,H2020,H2020-MSCA-ITN-2014,CoACH(2015), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and School of Electrical and Electronic Engineering

Subjects
thermal sensors, Materials science, fiber fabrication, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Fiber Fabrication, wearable electronics, Thermoelectric effect, Thermal, Thermoelectric Fibers, General Materials Science, Image resolution, thermoelectric fibers, mechanical flexibility, glassy semiconductors, business.industry, [CHIM.MATE]Chemical Sciences/Material chemistry, Atmospheric temperature range, 021001 nanoscience & nanotechnology, Cladding (fiber optics), 0104 chemical sciences, Semiconductor, Temporal resolution, Electrical and electronic engineering [Engineering], Optoelectronics, Millimeter, 0210 nano-technology, business
Abstract

Flexible, large-area, and low-cost thermal sensing networks with high spatial and temporal resolution are of profound importance in addressing the increasing needs for industrial processing, medical diagnosis, and military defense. Here, a thermoelectric (TE) fiber is fabricated by thermally codrawing a macroscopic preform containing a semiconducting glass core and a polymer cladding to deliver thermal sensor functionalities at fiber-optic length scales, flexibility, and uniformity. The resulting TE fiber sensor operates in a wide temperature range with high thermal detection sensitivity and accuracy, while offering ultraflexibility with the bending curvature radius below 2.5 mm. Additionally, a single TE fiber can either sense the spot temperature variation or locate the heat/cold spot on the fiber. As a proof of concept, a two-dimensional 3 × 3 fiber array is woven into a textile to simultaneously detect the temperature distribution and the position of heat/cold source with the spatial resolution of millimeter. Achieving this may lead to the realization of large-area, flexible, and wearable temperature sensing fabrics for wearable electronics and advanced artificial intelligence applications. Ministry of Education (MOE) Nanyang Technological University Accepted version This work is supported in part by the Singapore Ministry of Education Academic Research Fund Tier 2 (MOE2015-T2-1- 066 and MOE2015-T2-2-010), Singapore Ministry of Education Academic Research Fund Tier 1 (RG85/16), and Nanyang Technological University (Start-up Grant M4081515: L.W.). Authors from Rennes acknowledges the European Commission’s H2020-MSCA grant (GA. 642557, CoACH-ETN).

Published
2018
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36. 8 mu m luminescence from a Tb3+ GaGeSbSe fiber

Author

Jean-Louis Doualan, Bruno Bureau, Virginie Nazabal, Patrice Camy, Florent Starecki, Catherine Boussard-Plédel, Alain Braud, Nora Abdellaoui, Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Agence Nationale de la Recherche (ANR) [ANR-15-CE39-0007], ANR-15-CE39-0007,OPTIGAS,Capteur tout optique infrarouge pour gaz dangereux(2015), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, business.industry, Chalcogenide, Doping, 02 engineering and technology, 021001 nanoscience & nanotechnology, Laser, 01 natural sciences, Fluorescence, Atomic and Molecular Physics, and Optics, law.invention, 010309 optics, Optical pumping, chemistry.chemical_compound, Optics, chemistry, law, Attenuation coefficient, 0103 physical sciences, [CHIM]Chemical Sciences, Fiber, 0210 nano-technology, business, Luminescence
Abstract

International audience; In this Letter, we report for the first time, to the best of our knowledge, on an emission at 8 μm from Tb-doped GaGeSbSe chalcogenide fibers with doping levels at 1000 ppm and 500 ppm. These fibers were drawn following conventional melt-quenching methods and pumped at 2.05 μm using a Tm: YAG laser. The spectroscopic properties of the emitting F7 manifold are investigated to rule out any parasitic signal mimicking the real Tb 8 μm emission. Time-resolved spectroscopic experiments are presented to build a comprehensive study of this 8 μm fluorescence recorded with a clear signal-to-noise ratio.

Published
2018
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37. Impact of Coinage Metal Insertion on the Thermoelectric Properties of GeTe Solid-State Solutions

Author

Bruno Fontaine, Régis Gautier, Bruno Bureau, Jean-François Halet, François Cheviré, Michael J. Reece, Catherine Boussard-Plédel, Francesco Gucci, Bhuvanesh Srinivasan, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Queen Mary University of London (QMUL), European Commission's Horizon research and innovation program under Marie Sklodowska-Curie [642557], European Project: 642557,H2020,H2020-MSCA-ITN-2014,CoACH(2015), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Condensed matter physics, Doping, Fermi level, 02 engineering and technology, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Thermoelectric materials, 01 natural sciences, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, symbols.namesake, General Energy, Effective mass (solid-state physics), Seebeck coefficient, Thermoelectric effect, symbols, Physical and Theoretical Chemistry, 0210 nano-technology, Electronic band structure, Solid solution
Abstract

International audience; A comprehensive study on the thermoelectric effect of Ag substitution in GeTe solid solutions, a congenital base for highly efficient TAGS-m [(GeTe)m(AgSbTe2)100m] thermoelectric materials, was performed. First-principles calculations were carried out to probe the changes arising from doping on the electronic band structure of GeTe, which exhibits a rhombohedral (r) structure at temperatures lower than 700 K. Aliovalent Ag substitution in GeTe increases the hole concentration and decreases the thermoelectric figure of merit (zT) due to the reduction of the Seebeck coefficient, which is ascribed mainly to the lowering of the Fermi level together with the loss of band degeneracy. The band structure and effective mass calculations of these doped materials also point to a soaring contribution from several hole pockets in the valence band. First-principles calculations carried out with two other group 11 transition metals (Cu, Au) reveal that silver substitution has the lowest impact on the thermopower of r-GeTe. A mean zT of similar to 0.85 at 773 K is achieved for Ge1xAgxTe (x

Published
2018
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38. Tb3+ doped Ga5Ge20Sb10Se65-xTex (x=0-37.5) chalcogenide glasses and fibers for MWIR and LWIR emissions

Author

Ya. Shpotyuk, Nora Abdellaoui, François Cheviré, J.L. Doualan, Florent Starecki, Petr Nemec, Emeline Baudet, Bruno Bureau, Alain Braud, Patrice Camy, Marc Dussauze, Catherine Boussard-Plédel, Virginie Nazabal, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), University of Pardubice, Institut des Sciences Moléculaires (ISM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Optigas ANR project [ANR-15-CE39-0007], Czech Science Foundation [16-17921S], Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1 (UB)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and ANR-15-CE39-0007,OPTIGAS,Capteur tout optique infrarouge pour gaz dangereux(2015)

Subjects
010302 applied physics, OCIS: 160.2750, 160.5690, 160.2290, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Materials science, Infrared, Chalcogenide, Doping, Analytical chemistry, Chalcogenide glass, chemistry.chemical_element, 02 engineering and technology, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Electronic, Optical and Magnetic Materials, chemistry.chemical_compound, chemistry, Telluride, Selenide, 0103 physical sciences, 0210 nano-technology, Luminescence, Tellurium
Abstract

International audience; Chalcogenide glasses with a nominal composition of Ga5Ge20Sb10Se65-xTex (x = 0, 10, 20, 25, 30, 32.5, 35, 37.5) were synthesized. Their physico-chemical properties, glass network structure and optical properties are clearly modified via the substitution of selenium by tellurium. Based on a detailed study of the Ga5Ge20Sb10Se65-xTexTex bulk glasses properties, the Ga5Ge20Sb10Se45Te20 seleno-telluride glass optimal composition has been selected for fiber drawing. The luminescence properties of Tb3+ (500 ppm) doped Ga5Ge20Sb10Se65 and Ga5Ge20Sb10Se45Te20 bulk glasses and fibers were studied. Radiative transitions parameters calculated from the Judd-Ofelt theory are compared to the experimental values. Mid-wavelength infrared emission in the range of 4.3-6.0 μm is attributed to the 7F5→7F6 transition of Tb3+ ions with a corresponding experimental lifetime of 8.9 and 7.8 ms for the selenide and seleno-telluride matrix, respectively. The 7F4→7F6emission was recorded at 3.1 μm with a good signal-to-noise ratio, evidencing a rather strong emission from the 7F4 manifold. Finally, although it was expected that the phonon energy will be lower for telluride glasses, selenide glasses are still more suitable for mid-wavelength infrared and long wavelength infrared emissions with well-defined emissions from 3.1 to 8 μm.

Published
2018
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39. Nd3+:Ga-Ge-Sb-S glasses and fibers for luminescence in mid-IR: Synthesis, structural characterization and rare earth spectroscopy

Author

Petr Němec, A. Trapananti, Jean-Louis Doualan, Florent Starecki, Karine Michel, Carmelo Prestipino, Catherine Boussard-Plédel, Radwan Chahal, Alain Braud, Virginie Nazabal, Bruno Bureau, J.L. Adam, Patrice Camy, Grégory Tricot, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), University of Pardubice, European Synchrotron Radiation Facility (ESRF), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Bureau de Recherches Géologiques et Minières (BRGM) (BRGM), ADEME, French Environment and Energy management agency (COPTIK), Optigas ANR project [ANR-15-CE39-0007], Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and ANR-15-CE39-0007,OPTIGAS,Capteur tout optique infrarouge pour gaz dangereux(2015)

Subjects
IONS, Materials science, Absorption spectroscopy, MU-M, Analytical chemistry, chemistry.chemical_element, 02 engineering and technology, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Neodymium, 010309 optics, WAVE-GUIDES, symbols.namesake, RAMAN, 0103 physical sciences, ABSORPTION, 2ND-HARMONIC GENERATION, Emission spectrum, Spectroscopy, Absorption (electromagnetic radiation), OPTICAL-FIBERS, Astrophysics::Galaxy Astrophysics, [PHYS]Physics [physics], Extended X-ray absorption fine structure, 021001 nanoscience & nanotechnology, Electronic, Optical and Magnetic Materials, LANTHANUM SULFIDE GLASS, chemistry, Excited state, DOPED CHALCOGENIDE FIBERS, symbols, 0210 nano-technology, Raman spectroscopy, SYSTEM
Abstract

International audience; With high refractive indices, appropriate solubility of rare earth, low phonon energy and transparency from the visible to 10 mu m, a Ga-Ge-Sb-S system allows emission from Nd3+ ions in the near-and mid-IR spectral ranges. The glass transition temperature, density, expansion coefficient, and near and mid-IR refractive indexes were measured on bulk samples. Their glass network structures were analyzed by Raman scattering spectrometry, NMR of Ga-71 and extended X-ray absorption fine structure (EXAFS, K-edge of Ga, Ge, Sb, S and Nd). The absorption and emission spectra of neodymium doped sulfide glasses were recorded from the visible to the mid-IR. Excited state lifetimes were measured for several transitions. The lifetimes decrease with the concentration of Nd3+, especially for the I-4(13/2) and I-4(11/2) levels. The spectroscopic parameters were determined by the Judd-Ofelt method, allowing the calculation of cross-section emissions and the evaluation of quantum yields. Optical attenuation and emission measurements of fiber were also performed with a broad 4.7-5.7 mu m emission band in the mid-IR. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Published
2018
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40. Impact of Te on the structure and77Se NMR spectra of Se-rich Ge–Te–Se glasses: a combined experimental and computational investigation

Author

Michaël Deschamps, Bruno Bureau, Chris J. Pickard, Catherine Boussard-Plédel, Laurent Le Pollès, Lila Bouëssel du Bourg, Eric Furet, and Claire Roiland

Subjects
NMR spectra database, Molecular dynamics, Molecular model, Chemistry, Spin echo, Analytical chemistry, General Physics and Astronomy, chemistry.chemical_element, Physical and Theoretical Chemistry, Tellurium, Spinning
Abstract

Selenium-rich Ge–Te–Se glasses have been synthesized along the GeSe4–GeTe4 pseudo-composition line and acquired by 77Se Hahn echo magic-angle spinning NMR. The comparison with the GeSe4 spectrum shows a drastic modification of the typical double-resonance lineshape even at low Te concentrations (

Published
2015
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41. Single mode chalcogenide glass fiber as wavefront filter for the DARWIN planet finding misson

Author

Sylvain Danto, Lun K. Cheng, W.L.M. Gielesen, Patrick Houizot, Jacques Lucas, Catherine Boussard-Plédel, A. J. Faber, and J. Pereira do Carmo

Subjects
Materials science, Optical fiber, Glass fibers, Wavefronts, Chalcogenide, Glass fiber, Refractive index, Single mode waveguides, Chalcogenide glass, law.invention, Carbon dioxide lasers, chemistry.chemical_compound, Absorption spectroscopy, Optics, law, Optical fibers, Mode propagation, TS - Technical Sciences, Chalcogenide glass fibers, Industrial Innovation, Fluid Mechanics Chemistry & Energetics, business.industry, Numerical aperture, Single-mode optical fiber, Planet finding, PMC - Process Modelling & Control, Bandpass filters, Cladding (fiber optics), Optical waveguides, Fibers, chemistry, Far-field intensity distribution, Fiber configuration, business, Chalcogenides
Abstract

The development of single mode chalcogenide glass fibers as wavefront filter for the DARWIN mission is reported. Melting procedures and different preform techniques for manufacturing core-cladding chalcogenide fibers are described. Bulk glass samples on the basis of Te-As-Se- and high Te-compositions have been characterized optically, by measurement of the absorption spectrum and the refractive index in the region 4 – 20 μm. Several chalcogenide core-cladding glass fiber configurations have been drawn and examined by microscopy. The mode propagation behaviour and numerical aperture of fiber samples have been determined by far field intensity distribution measurements, using a CO2 laser at 10.6 μm. Single mode waveguide performance has been demonstrated for several fiber samples, coated with an absorbing Gallium layer for stripping of cladding modes.

Published
2017
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42. Mid-infrared spectroscopy of serum, a promising non-invasive method to assess prognosis in patients with ascites and cirrhosis

Author

Caroline Jezequel, Maëna Le Corvec, Olivier Sire, Edouard Bardou-Jacquet, Bruno Bureau, Catherine Boussard-Plédel, Frédéric Charpentier, Hugues Tariel, Nadia Fatih, Valérie Monbet, Olivier Loréal, DIAFIR, Institut de Recherche Dupuy de Lôme (IRDL), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Centre National de la Recherche Scientifique (CNRS), Service des Maladies de l'Appareil Digestif [CHU Rennes], CHU Pontchaillou [Rennes], Applications of interacting particle systems to statistics (ASPI), Institut de Recherche Mathématique de Rennes (IRMAR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École normale supérieure - Rennes (ENS Rennes)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-INSTITUT AGRO Agrocampus Ouest, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Inria Rennes – Bretagne Atlantique, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Nutrition, Métabolismes et Cancer (NuMeCan), Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut des Sciences Chimiques de Rennes (ISCR), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Ingénierie des Matériaux de Bretagne (LIMATB), Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université de Brest (UBO), 10-EMMA-0048, Agence Nationale de la Recherche, IRMAR-STAT, Guillemer, Marie-Annick, Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Université de Bretagne Sud (UBS), Service des Maladies de l'Appareil Digestif, Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Hôpital Pontchaillou-CHU Pontchaillou [Rennes], AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Université de Rennes 2 (UR2), Université de Rennes (UNIV-RENNES)-École normale supérieure - Rennes (ENS Rennes)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-AGROCAMPUS OUEST, Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Inria Rennes – Bretagne Atlantique, Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Bardou-Jacquet, Edouard, ANR-11-LABX-0020,LEBESGUE,Centre de Mathématiques Henri Lebesgue : fondements, interactions, applications et Formation(2011), Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), and Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes)

Subjects
Male, Serum, Cirrhosis, Spectrophotometry, Infrared, Physiology, diagnosis, medicine.medical_treatment, hepatocellular-carcinoma, lcsh:Medicine, Liver transplantation, Logistic regression, 01 natural sciences, Gastroenterology, Spectrum Analysis Techniques, 0302 clinical medicine, [MATH.MATH-ST]Mathematics [math]/Statistics [math.ST], Ascites, Medicine and Health Sciences, hepatic-encephalopathy, Bile, lcsh:Science, Hepatic encephalopathy, [MATH.MATH-ST] Mathematics [math]/Statistics [math.ST], Multidisciplinary, Liver Diseases, Physics, Classical Mechanics, Absorption Spectroscopy, Middle Aged, Prognosis, infrared-spectroscopy, Body Fluids, Area Under Curve, Hepatocellular carcinoma, Physical Sciences, Female, 030211 gastroenterology & hepatology, Anatomy, medicine.symptom, stage liver-disease, Algorithms, decompensated cirrhosis, Research Article, medicine.medical_specialty, Surgical and Invasive Medical Procedures, Gastroenterology and Hepatology, Research and Analysis Methods, Risk Assessment, Sensitivity and Specificity, Vibration, survival, 010309 optics, Digestive System Procedures, 03 medical and health sciences, Breast cancer, Diagnostic Medicine, Internal medicine, 0103 physical sciences, medicine, Humans, breast-cancer, Transplantation, model, Receiver operating characteristic, business.industry, lcsh:R, Reproducibility of Results, Biology and Life Sciences, Bilirubin, Organ Transplantation, medicine.disease, Fibrosis, Liver Transplantation, FTIR spectroscopy, ROC Curve, lcsh:Q, business, Biomarkers
Abstract

International audience; Background & aims:Prognostic tests are critical in the management of patients with cirrhosis and ascites. Biological tests or scores perform poorly in that situation. Mid-infrared fibre evanescent wave spectroscopy (MIR-FEWS) which allows for global serum metabolic profiling may provide more relevant information by measuring a wider range of metabolic parameters in serum. Here we present the accuracy of a MIR-FEWS based predictive model for the prognosis of 6 months survival in patients with ascites and cirrhosis.Methods: Patients with ascites were prospectively included and followed up for 6 months. MIR-FEWS spectra were measured in serum samples. The most informative spectral variables obtained by MIR-FEWS were selected by FADA algorithm and then used to build the MIR model. Accuracy of this model was assessed by ROC curves and 90%/10% Monte Carlo cross-validation. MIR model accuracy for 6 months survival was compared to that of the Child-Pugh and MELD scores.Results: 119 patients were included. The mean age was 57.36±13.70, the MELD score was 16.32±6.26, and the Child-Pugh score was 9.5±1.83. During follow-up, 23 patients died (20%). The MIR model had an AUROC for 6 months mortality of 0.90 (CI95: 0.88–0.91), the MELD 0.77 (CI95: 0.66–0.89) and Child-Pugh 0.76 (CI95: 0.66–0.88). MELD and Child-Pugh AUROCs were significantly lower than that of the MIR model (p = 0.02 and p = 0.02 respectively). Multivariate logistic regression analysis showed that MELD (p

Published
2017
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43. On the glass transition temperature T against molar volume V plotting in arsenoselenide glasses

Author

V. Balitska, Catherine Boussard-Plédel, Bruno Bureau, J. Szlęzak, V. Boyko, Oleh Shpotyuk, Ya. Shpotyuk, M. Shpotyuk, National Polytechnic University of Lviv (LPNU), Rzeszow University of Technology, Ivan Franko National University of Lviv, Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Jan Dlugosz University in Czestochowa, Ministry of Education and Science of Ukraine, MESU, Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)

Subjects
Materials science, Molar volume, Thermodynamics, Chalcogenide glass, 02 engineering and technology, 01 natural sciences, symbols.namesake, 0103 physical sciences, Master equation, Materials Chemistry, Glass transition temperature, Bond energy, 010302 applied physics, Van der Waals interaction, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Glass-forming network, Ceramics and Composites, symbols, Arsenoselenides, van der Waals force, 0210 nano-technology, Glass transition
Abstract

International audience; Dependence of glass transition temperature Tg (K) on overall mean bonding energy E (kJ/mol) in arsenoselenide glass reexamined under per-atom calculations is shown to obey linearized master equation Tg ≅ 418⋅(E–1.13). Compositional variations in Tg against molar volume Vm are plotted for g-AsxSe100- x taken within (0 ≤ x ≤ 65) domain assuming preferential cohesive Van der Waals (VDW) bonding between network-constituting entities. The Tg values are found to vary as inverse-αth power of Vm, attaining distinct values for different networks, in part, 0D-molecular (α=6/3= 2), 1D-chained (α=5/3), 2D-layered (α=4/3), and 3D-spatial (α=3/3=1). These variations originated from macroscopic geometry of VDW interaction are linearized in log-log presentation for networks dominated with chain-like 1D-entities (0 ≤ x

Published
2020
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44. Thermal and structural characterization of erbium-doped borosilicate fibers with low silica content containing various amounts of P2O5 and Al2O3

Author

Bruno Bureau, Leena Hupa, Yaroslav Shpotyuk, Jonathan Massera, Monica Ferraris, Thierry Jouan, Mikko Hupa, Joona Koponen, Ville Aallos, Laeticia Petit, Kevin Bourhis, Catherine Boussard-Plédel, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Process Chemistry Centre, Åbo Academy University, School of Material Science and Engineering, Clemson University, Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
All-silica fiber, Luminescence, Materials science, chemistry.chemical_element, 02 engineering and technology, 01 natural sciences, Inorganic Chemistry, Erbium, Amorphous materials, 0103 physical sciences, Fiber, Electrical and Electronic Engineering, Physical and Theoretical Chemistry, Composite material, Boron, Absorption (electromagnetic radiation), Spectroscopy, 010302 applied physics, Borosilicate glass, Glasses, Organic Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Amorphous solid, chemistry, Optical materials, Raman spectroscopy, 0210 nano-technology, Hard-clad silica optical fiber
Abstract

International audience; We report results on the processing and characterization of different glass preforms and single core fibers within the SiO2-Na2O-B2O3-Er2O3-P2O5-Al2O3 system. Micro-Raman spectroscopy was used to identify post-draw structural modification. The differences in the micro-Raman spectra recorded on the preform and on the fiber glass were attributed to a change in the structure induced by the drawing process. Changes in the silicate network organization and small scale molecular orientation within the glass matrix are suspected to occur during the fiber drawing process. We found that the extent in the changes between the preform and fiber properties depend on the glass composition. The glass network of the Al-containing fiber is expected to be less sensitive to the drawing process than that of the fiber matrix as the network of this Al-containing fiber is formed by a larger number of Si-BO units in the network and neutral three-coordinated boron compared to the network of the fiber matrix. From the micro-Raman spectra, formation of small crystals is suspected to occur in the P-containing glasses during the fiber drawing process. The resulting fibers were found to have propagation losses at 1330 nm and Er3+ absorption between (7 ± 1) and (25 ± 1) dB/m and (36 ± 1) and (47 ± 1) dB/m, respectively, depending on the glass composition.

Published
2014
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45. Phase-change materials based on amorphous equichalcogenides

Author

Roman Golovchak, Jarres Plummer, Andriy Kovalskiy, Yuriy Holovchak, Tetyana Ignatova, Anthony Trofe, Bohdan Mahlovanyi, Jozef Cebulski, Piotr Krzeminski, Yaroslav Shpotyuk, Catherine Boussard-Pledel, and Bruno Bureau

Subjects
Medicine, Science
Abstract

Abstract Phase-change materials, demonstrating a rapid switching between two distinct states with a sharp contrast in electrical, optical or magnetic properties, are vital for modern photonic and electronic devices. To date, this effect is observed in chalcogenide compounds based on Se, Te or both, and most recently in stoichiometric Sb2S3 composition. Yet, to achieve best integrability into modern photonics and electronics, the mixed S/Se/Te phase change medium is needed, which would allow a wide tuning range for such important physical properties as vitreous phase stability, radiation and photo-sensitivity, optical gap, electrical and thermal conductivity, non-linear optical effects, as well as the possibility of structural modification at nanoscale. In this work, a thermally-induced high-to-low resistivity switching below 200 °C is demonstrated in Sb-rich equichalcogenides (containing S, Se and Te in equal proportions). The nanoscale mechanism is associated with interchange between tetrahedral and octahedral coordination of Ge and Sb atoms, substitution of Te in the nearest Ge environment by S or Se, and Sb–Ge/Sb bonds formation upon further annealing. The material can be integrated into chalcogenide-based multifunctional platforms, neuromorphic computational systems, photonic devices and sensors.

Published
2023
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46. Positron annihilation probing of crystallization effects in TAS-235 glass affected by Ga additions

Author

Roman Szatanik, Bruno Bureau, Oleh Shpotyuk, Virginie Nazabal, Yaroslav Shpotyuk, Adam Ingram, Catherine Boussard-Plédel, Institute of Physics [Jan Dlugosz University in Częstochowa], Jan Dlugosz University in Czestochowa, Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institute of Physics, JAN DLUGOSZ UNIV, Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)

Subjects
Materials science, Alloy, 02 engineering and technology, engineering.material, 01 natural sciences, law.invention, Positron annihilation spectroscopy, Positron, law, 0103 physical sciences, [CHIM]Chemical Sciences, General Materials Science, Crystallization, ComputingMilieux_MISCELLANEOUS, 010302 applied physics, Annihilation, General Chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Amorphous solid, Crystallography, Microcrystalline, Chemical physics, engineering, 0210 nano-technology, Doppler broadening
Abstract

Crystallization effects in Te20As30Se50 glass known also as TAS-235 affected by Ga additions to Ga2Te20As28Se50 and Ga5Te20As25Se50 compositions are probed with positron annihilation spectroscopy in the measuring modes exploring positron lifetimes and Doppler broadening of annihilation line. Occurring of cubic-phase Ga2Se3 droplets with character nanoscale sizes in partially-crystallized Ga2Te20As28Se50 alloy is shown to be associated with agglomeration of intrinsic free-volume voids, this process being enhanced over microcrystalline scale in Ga5Te20As25Se50 alloy. Crystallization changes in the void structure of TAS-235 glass are considered in terms of free-volume evolution under the same principal chemical environment responsible for positron trapping in amorphous and partially crystallized substances.

Published
2014
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47. The Development of Advanced Optical Fibers for Long-Wave Infrared Transmission

Author

Patrick Houizot, Bruno Bureau, Sébastien Maurugeon, Allison A. Wilhelm, Xianghua Zhang, Sylvain Danto, Pierre Lucas, Clément Conseil, Catherine Boussard-Plédel, Department of Materials Science and Engineering, University of Arizona, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Photonic Band Gap Fibers and Devices Group, Massachusetts Institute of Technology (MIT), LAboratoire de Recherche en Mécanique Appliquée (LARMAUR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Optical fiber, Chalcogenide glass, Physics::Optics, 02 engineering and technology, 01 natural sciences, law.invention, 010309 optics, Biomaterials, chalcogenide glass, Zero-dispersion wavelength, Optics, law, long-wave infrared, lcsh:TP890-933, lcsh:TP200-248, 0103 physical sciences, Fiber, lcsh:QH301-705.5, Civil and Structural Engineering, infrared fibers, telluride glass, business.industry, Attenuation, lcsh:Chemicals: Manufacture, use, etc, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, lcsh:QC1-999, lcsh:Biology (General), Mechanics of Materials, Ceramics and Composites, Charge carrier, lcsh:Textile bleaching, dyeing, printing, etc, 0210 nano-technology, business, Hard-clad silica optical fiber, lcsh:Physics, Photonic-crystal fiber
Abstract

Long-wave infrared fibers are used in an increasing number of applications ranging from thermal imaging to bio-sensing. However, the design of optical fiber with low-loss in the far-infrared requires a combination of properties including good rheological characteristics for fiber drawing and low phonon energy for wide optical transparency, which are often mutually exclusive and can only be achieved through fine materials engineering. This paper presents strategies for obtaining low loss fibers in the far-infrared based on telluride glasses. The composition of the glasses is systematically investigated to obtained fibers with minimal losses. The fiber attenuation is shown to depend strongly on extrinsic impurity but also on intrinsic charge carrier populations in these low band-gap amorphous semiconductor materials.

Published
2013
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48. Preparation of High Purity Te-Rich Ge-Te-Se Fibers for 5–15 $\mu$m Infrared Range

Author

A. M. Potapov, Vladimir Shiryaev, Bruno Bureau, J. Troles, A. I. Suchkov, Clément Conseil, Catherine Boussard-Plédel, Shuo Cui, Alexander Velmuzhov, M. F. Churbanov, Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institute of Chemistry of High-Purity Substances, the Russian Academy of Sciences [Moscow, Russia] (RAS), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)

Subjects
optical fiber, Optical fiber, purification, Absorption spectroscopy, Infrared, Analytical chemistry, Infrared spectroscopy, Chalcogenide glass, far-infrared, 02 engineering and technology, 01 natural sciences, law.invention, Optics, Far infrared, law, Impurity, 0103 physical sciences, 010302 applied physics, business.industry, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, 0210 nano-technology, business, Refractive index
Abstract

Te rich glasses in the ternary Ge-Te-Se system are stable against crystallization and remain transparent enough for application in the far infrared beyond 15 $\mu$ m. Four protocoles of preparation of highly-purified Te-rich Ge-Te-Se glasses are developed and compared. These methods are based on different distillation procedures to remove water, oxides, hydrogen and carbon impurities from glasses. The final residual impurity content in glasses was determined by the IR spectroscopy and laser mass spectrometry. Then, unclad optical fibers were drawn from each synthetized glass. At room temperature, the minimum of attenuation is about 7 dB/m at 10.6 $\mu$ m whatever the purification procedure, showing that the residual optical losses are intrinsic to the chemical nature of the glasses. On the other hand, at 77 K, the optical losses are lowered to 1 dB/m confirming that losses are mainly due to the high charge carrier concentration inherent to the semi-conducting behavior of these glasses. Finally, this low level of losses is rather a promising news in view of application in space where optical filtering devices working beyond 15 $\mu$ m are needed.

Published
2013
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49. Chalcogenide glass sensors for bio-molecule detection

Author

Bruno Bureau, Johann Troles, Pierre Lucas, Tao Luo, Zhiyong Yang, Christopher Cantoni, Garrett J. Coleman, Catherine Boussard-Plédel, Shibin Jiang, Department of Materials Science and Engineering, University of Arizona, Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Vibrational spectroscopy, Optical fiber, Materials science, Infrared, Chalcogenide, Infrared fibers, Chalcogenide glass, 02 engineering and technology, Microresonators. Evanescent wave spectroscopy, 01 natural sciences, Signal, Infrared materials, law.invention, 010309 optics, chemistry.chemical_compound, Optics, law, 0103 physical sciences, [CHIM]Chemical Sciences, Infrared spectroscopy, business.industry, 021001 nanoscience & nanotechnology, Amorphous solid, Lens (optics), chemistry, Infrared window, Optoelectronics, 0210 nano-technology, business, Bio-sensors
Abstract

International audience; Chalcogenide glasses constitute the only class of materials that remain fully amorphous while exhibiting broad optical transparency over the full infrared region from 2-20 microns. As such, they can be shaped into complex optical elements while retaining a clear optical window that encompass the vibrational signals of virtually any molecules. Chalcogenide glasses are therefore ideal materials for designing biological and chemical sensors based on vibrational spectroscopy. In this paper we review the properties of these glasses and the corresponding design of optical elements for bio-chemical sensing. Amorphous chalcogenides offer a very wide compositional landscape that permit to tune their physical properties to match specific demands for the production of optical devices. This includes tailoring the infrared window over specific ranges of wavelength such as the long-wave infrared region to capture important vibrational signal including the "signature region" of micro-organisms or the bending mode of CO2 molecules. Additionally, compositional engineering enables tuning the viscosity-temperature dependence of the glass melt in order to control the rheological properties that are fundamental to the production of glass elements. Indeed, exquisite control of the viscosity is key to the fabrication process of many optical elements such as fiber drawing, lens molding, surface embossing or reflow of microresonators. Optimal control of these properties then enables the design and fabrication of optimized infrared sensors such as Fiber Evanescent Wave Spectroscopy (FEWS) sensors, Whispering Gallery Modes (WGM) micro-resonator sensors, nanostructured surfaces for integrated optics and surface-enhanced processes, or lens molding for focused collection of infrared signals. Many of these sensor designs can be adapted to collect and monitor the vibrational signal of live microorganisms to study their metabolism in controlled environmental conditions. Further materials engineering enable the design of opto-electrophoretic sensors that permit simultaneous capture and detection of hazardous bio-molecules such as bacteria, virus and proteins using a conducting glass that serves as both an electrode and an optical elements. Upon adequate spectral analysis such as Principal Component Analysis (PCA) or Partial Least Square (PLS) regression these devices enable highly selective identification of hazardous microorganism such as different strains of bacteria and food pathogens. © 2017 SPIE.

Published
2017
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50. The influence of Sb on glass-forming ability of Ga-containing As2Se3 glasses

Author

Catherine Boussard-Plédel, Bruno Bureau, Virginie Nazabal, Yaroslav Shpotyuk, University of Rzeszow, Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), The publication contains the results of studies conducted by President's of Ukraine grant for competitive projects (F63/55-2016) of the State Fund for Fundamental Research., Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Diffraction, Materials science, crystallization, Analytical chemistry, Chalcogenide glass, Mineralogy, 02 engineering and technology, 01 natural sciences, Glass forming, law.invention, symbols.namesake, chalcogenide glass, Differential scanning calorimetry, law, 0103 physical sciences, Materials Chemistry, [CHIM]Chemical Sciences, ir transmission, Crystallization, Spectroscopy, 010302 applied physics, Doping, 021001 nanoscience & nanotechnology, Ceramics and Composites, symbols, 0210 nano-technology, Raman scattering, glass-forming ability
Abstract

International audience; Effect of As to Sb substitution on glass-forming ability of As2Se3 glass under Ga additions was comprehensively studied using optical spectroscopy in visible and IR regions, differential scanning calorimetry, X-ray diffraction as well as Raman scattering techniques. The crystallization processes enhanced by Ga additions to As2Se3 glass were significantly suppressed under such As to Sb substitution. Following conventional synthesis, it was possible to substitute up to 50% of As by Sb within Ga-y(As0.40-xSbxSe0.60)(100-y) cut-section without essential impact on glassy state, thus improving optical properties in the IR region by lowering the phonon energy. In the case of Ga-y(As0.28Sb0.12Se0.60)(100-y) cut-section, up to 8at.% of Ga can be introduced without crystallization, whereasin case of Ga-y(As0.40Se0.60)(100-y) system, glass-forming ability is limited just up to 3at.% of Ga. The prepared Ga-5(As0.28Sb0.12Se0.60)(95) glass composition was shown to be the richest in Ga keeping its vitreous state, good optical and thermodynamic properties allowing further rare-earth doping and fiber drawing.

Published
2017
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