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1. Luminescent Ln3+-based silsesquioxanes with a β-diketonate antenna ligand: toward the design of efficient temperature sensors

Author

Gautier Félix, Alena N. Kulakova, Saad Sene, Victor N. Khrustalev, Miguel A. Hernández-Rodríguez, Elena S. Shubina, Tristan Pelluau, Luís D. Carlos, Yannick Guari, Albano N. Carneiro Neto, Alexey N. Bilyachenko, and Joulia Larionova

Subjects
thermometry, silsesquioxanes, lanthanides, luminescence, magnetism, energy transfer, Chemistry, QD1-999
Abstract

We report the synthesis and single-crystal X-ray diffraction, magnetic, and luminescence measurements of a novel family of luminescent cage-like tetranuclear silsesquioxanes (PhSiO1.5)8(LnO1.5)4(O)(C5H8O2)6(EtOH)2(CH3CN)2⋅2CH3CN (where Ln = Tb, 1; Tb/Eu, 2; and Gd, 3), featuring seven-coordinated lanthanide ions arranged in a one-capped trigonal prism geometry. Compounds 1 and 2 exhibit characteristic Tb3+ and Tb3+/Eu3+-related emissions, respectively, sensitized by the chelating antenna acetylacetonate (acac) ligands upon excitation in the UV and visible spectral regions. Compound 3 is used to assess the energies of the triplet states of the acac ligand. For compound 1, theoretical calculations on the intramolecular energy transfer and multiphonon rates indicate a thermal balance between the 5D4 Stark components, while the mixed Tb3+/Eu3+ analog 2, with a Tb:Eu ratio of 3:1, showcases intra-cluster Tb3+-to-Eu3+ energy transfer, calculated theoretically as a function of temperature. By utilizing the intensity ratio between the 5D4→7F5 (Tb3+) and 5D0→7F2 (Eu3+) transitions in the range 11–373 K, we demonstrate the realization of a ratiometric luminescent thermometer with compound 2, operating in the range 11–373 K with a maximum relative sensitivity of 2.0% K−1 at 373 K. These findings highlight the potential of cage-like silsesquioxanes as versatile materials for optical sensing-enabled applications.

Published
2024
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2. 4D Printing Nanocomposite Hydrogel Based on PNIPAM and Prussian Blue Nanoparticles Using Stereolithography

Author

Tristan Pelluau, Thomas Brossier, Michel Habib, Saad Sene, Gautier Félix, Joulia Larionova, Sébastien Blanquer, and Yannick Guari

Subjects
4D printing, light induced polymerization, nanoparticles, poly(N‐isopropylacrylamide), Prussian blue, stereolithography, Materials of engineering and construction. Mechanics of materials, TA401-492, Engineering (General). Civil engineering (General), TA1-2040
Abstract

Abstract The potential of photoactive Prussian blue nanoparticles dispersed in thermo‐responsive PNIPAM hydrogels in 4D printing using a stereolithography is investigated with digital light processing. The proportion of Prussian blue nanoparticles used in the resin is chosen to deliver a significant photothermal effect providing a heating above the volume phase transition temperature of the final nanocomposite hydrogels; while, giving only a limited effect on light scattering during the 3D printing process. Four formulations with various amounts of Prussian blue nanoparticles are used to print 3D structures with different shapes, such as Aztec pyramids, cylinders, gyroid porous cubes, and porous films. The shrinkage effect triggered by light irradiation at 808 nm on the as‐obtained nanocomposite hydrogels is demonstrated through the delivery of a representative molecule fluorescein and a triggered 4D shape‐morphing effect.

Published
2024
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3. Magnetic Iron Oxide Nanoparticles Coated by Coumarin-Bound Copolymer for Enhanced Magneto- and Photothermal Heating and Luminescent Thermometry

Author

Alexiane Féron, Sylvain Catrouillet, Saad Sene, Gautier Félix, Belkacem Tarek Benkhaled, Vincent Lapinte, Yannick Guari, and Joulia Larionova

Subjects
nanoparticles, polymeric coating, luminescence, thermometry, coumarin, Chemistry, QD1-999
Abstract

In this work, we report on the synthesis and investigation of new hybrid multifunctional iron oxide nanoparticles (IONPs) coated by coumarin-bound copolymer, which combine magneto- or photothermal heating with luminescent thermometry. A series of amphiphilic block copolymers, including Coum-C11-PPhOx27-PMOx59 and Coum-C11-PButOx8-PMOx42 bearing luminescent and photodimerizable coumarin moiety, as well as coumarin-free PPhOx27-PMOx57, were evaluated for their utility as luminescent thermometers and for encapsulating spherical 26 nm IONPs. The obtained IONP@Coum-C11-PPhOx27-PMOx59 nano-objects are perfectly dispersible in water and able to provide macroscopic heating remotely triggered by an alternating current magnetic field (AMF) with a specific absorption rate (SAR) value of 240 W.g−1 or laser irradiation with a photothermal conversion efficiency of η = 68%. On the other hand, they exhibit temperature-dependent emission of coumarin offering the function of luminescent thermometer, which operates in the visible region between 20 °C and 60 °C in water displaying a maximal relative thermal sensitivity (Sr) of 1.53%·°C−1 at 60 °C.

Published
2024
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4. Synthesis and Characterization of Tetraphenylethene AIEgen-Based Push–Pull Chromophores for Photothermal Applications: Could the Cycloaddition–Retroelectrocyclization Click Reaction Make Any Molecule Photothermally Active?

Author

Maxime Roger, Yann Bretonnière, Yann Trolez, Antoine Vacher, Imane Arbouch, Jérôme Cornil, Gautier Félix, Julien De Winter, Sébastien Richeter, Sébastien Clément, and Philippe Gerbier

Subjects
TPE, AIEgen, cycloaddition-retroelectrocyclization, click chemistry, photothermal applications, Biology (General), QH301-705.5, Chemistry, QD1-999
Abstract

Three new tetraphenylethene (TPE) push–pull chromophores exhibiting strong intramolecular charge transfer (ICT) are described. They were obtained via [2 + 2] cycloaddition–retroelectrocyclization (CA-RE) click reactions on an electron-rich alkyne-tetrafunctionalized TPE (TPE-alkyne) using both 1,1,2,2-tetracyanoethene (TCNE), 7,7,8,8-tetracyanoquinodimethane (TCNQ) and 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ) as electron-deficient alkenes. Only the starting TPE-alkyne displayed significant AIE behavior, whereas for TPE-TCNE, a faint effect was observed, and for TPE-TCNQ and TPE-F4-TCNQ, no fluorescence was observed in any conditions. The main ICT bands that dominate the UV–Visible absorption spectra underwent a pronounced red-shift beyond the near-infrared (NIR) region for TPE-F4-TCNQ. Based on TD-DFT calculations, it was shown that the ICT character shown by the compounds exclusively originated from the clicked moieties independently of the nature of the central molecular platform. Photothermal (PT) studies conducted on both TPE-TCNQ and TPE-F4-TCNQ in the solid state revealed excellent properties, especially for TPE-F4-TCNQ. These results indicated that CA-RE reaction of TCNQ or F4-TCNQ with donor-substituted are promising candidates for PT applications.

Published
2023
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5. Magneto-Induced Hyperthermia and Temperature Detection in Single Iron Oxide Core-Silica/Tb3+/Eu3+(Acac) Shell Nano-Objects

Author

Karina Nigoghossian, Basile Bouvet, Gautier Félix, Saad Sene, Luca Costa, Pierre-Emmanuel Milhet, Albano N. Carneiro Neto, Luis D. Carlos, Erwan Oliviero, Yannick Guari, and Joulia Larionova

Subjects
luminescence, lanthanide coordination complexes, nanothermometry, magnetic iron oxide nanoparticles, magnetothermia, hybrid nano-systems, Chemistry, QD1-999
Abstract

Multifunctional nano-objects containing a magnetic heater and a temperature emissive sensor in the same nanoparticle have recently emerged as promising tools towards personalized nanomedicine permitting hyperthermia-assisted treatment under local temperature control. However, a fine control of nano-systems’ morphology permitting the synthesis of a single magnetic core with controlled position of the sensor presents a main challenge. We report here the design of new iron oxide core–silica shell nano-objects containing luminescent Tb3+/Eu3+-(acetylacetonate) moieties covalently anchored to the silica surface, which act as a promising heater/thermometer system. They present a single magnetic core and a controlled thickness of the silica shell, permitting a uniform spatial distribution of the emissive nanothermometer relative to the heat source. These nanoparticles exhibit the Tb3+ and Eu3+ characteristic emissions and suitable magnetic properties that make them efficient as a nanoheater with a Ln3+-based emissive self-referencing temperature sensor covalently coupled to it. Heating capacity under an alternating current magnetic field was demonstrated by thermal imaging. This system offers a new strategy permitting a rapid heating of a solution under an applied magnetic field and a local self-referencing temperature sensing with excellent thermal sensitivity (1.64%·K−1 (at 40 °C)) in the range 25–70 °C, good photostability, and reproducibility after several heating cycles.

Published
2022
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6. A Novel Approach to the Facile Growth and Organization of Photothermal Prussian Blue Nanocrystals on Different Surfaces

Author

Giang Ngo, Gautier Félix, Christophe Dorandeu, Jean-Marie Devoisselle, Luca Costa, Pierre-Emmanuel Milhiet, Yannick Guari, Joulia Larionova, and Joël Chopineau

Subjects
Prussian blue, nanostructures, surface growth, atomic force microscopy, gold surface, supported lipid bilayers, Chemistry, QD1-999
Abstract

We report here a novel “one-pot” approach for the controlled growth and organization of Prussian blue nanostructures on three different surfaces: pure Au0, cysteamine-functionalized Au0, and SiO2-supported lipid bilayers with different natures of lipids. We demonstrate that fine control over the size, morphology, and the degree and homogeneity of the surface coverage by Prussian Blue (PB) nanostructures may be achieved by manipulating different parameters, which are the precursor concentration, the nature of the functional groups or the nature of lipids on the surfaces. This allows the growth of isolated PB nanopyramids and nanocubes or the design of thin dense films over centimeter square surfaces. The formation of unusual Prussian blue nanopyramids is discussed. Finally, we demonstrate, by using experimental techniques and theoretical modeling, that PB nanoparticles deposited on the gold surface exhibit strong photothermal properties, permitting a rapid temperature increase up to 90 °C with a conversion of the laser power of almost 50% for power source heat.

Published
2021
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7. Hybrid spin-crossover nanostructures

Author

Carlos M. Quintero, Gautier Félix, Iurii Suleimanov, José Sánchez Costa, Gábor Molnár, Lionel Salmon, William Nicolazzi, and Azzedine Bousseksou

Subjects
core–shell particle, multifunctionality, nanomaterials, spin-crossover, Technology, Chemical technology, TP1-1185, Science, Physics, QC1-999
Abstract

This review reports on the recent progress in the synthesis, modelling and application of hybrid spin-crossover materials, including core–shell nanoparticles and multilayer thin films or nanopatterns. These systems combine, often in synergy, different physical properties (optical, magnetic, mechanical and electrical) of their constituents with the switching properties of spin-crossover complexes, providing access to materials with unprecedented capabilities.

Published
2014
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8. Cascade strategy for triggered radical release by magnetic nanoparticles grafted with thermosensitive alkoxyamine

Author

Basile Bouvet, Saad Sene, Gautier Félix, Jeffrey Havot, Gerard Audran, Sylvain R. A. Marque, Joulia Larionova, and Yannick Guari

Subjects
General Materials Science
Abstract

The design of smart nanoplatforms presenting well-definite structures able to achieve controlled cascade action remotely triggered by external stimuli presents a great challenge. We report here a new nanosystem consisting of magnetic iron oxide nanoparticles covalently grafted with a thermosensitive radical initiator alkoxyamine, able to provide controlled and localized release of free radicals triggered by an alternating current (ac) magnetic field. These nanoparticles exhibit a high intrinsic loss power of 4.73 nHm

Published
2023

9. Composites based on nitroprusside cyano-bridged coordination polymer particles and chitosan for NO delivery

Author

Melvyn Gorra, Frantz Ndebulia Watchou, Maria A. Palacios, Jérôme Long, Saad Sene, Gautier Félix, Nathalie Tanchoux, Françoise Quignard, Joulia Larionova, and Yannick Guari

Subjects
Materials Chemistry, General Chemistry, Catalysis
Abstract

We report the design of new composite films {Fe[Fe(CN)5(NO)]}0.55@C6H11NO4 and {Ag2[Fe(CN)5(NO)]}0.28@ C6H11NO4 based on cyano-bridged coordination polymers FeII[FeII(CN)5(NO)] or Ag2 I[FeII(CN)5(NO)] grown into a chitosan matrix that are able to provide a slow NO radical release under white light irradiation. The characterisation methods such as X-ray diffraction, TGA, SEM-EDX, IR and UV-vis spectroscopies show that these composites are made of ca. 50 wt% of the cyano-bridged coordination polymer as microcrystalline particles embedded into chitosan films. Irradiation for 7 days by using white light results in initiating a 6.5 and 10.6% NO radical delivery for {Fe[Fe(CN)5(NO)]}0.55@C6H11NO4 and {Ag2[Fe(CN)5(NO)]}0.28@C6H11NO4, respectively. The rearrangement of the cyano-bridged coordination compounds after the NO departure leads to the formation of Prussian blue or silver Prussian blue analogues, which limits the unwanted release of cyanide as a side effect., Institut Carnot Chimie Balard Cirimat, SATT AxLR

Published
2023

10. Synthesis and Characterization of Tetraphenylethene AIEgen-Based Push-Pull Chromophores for Photothermal Applications: Do the Cycloaddition – Retroelectrocyclization Click Reaction Could Make any Molecule Photothermally Active?

Author

Maxime Roger, Yann Bretonnière, Yann Trolez, Antoine Vacher, Imane Arbouch, Jérôme Cornil, Gautier Félix, Julien De Winter, Sébastien Richeter, Sébastien Clément, and Philippe Gerbier

Abstract

Three new tetraphenylethene (TPE) push-pull chromophores exhibiting strong intramolecular charge transfer (ICT) are described. They were obtained via [2+2] cycloaddition - retroelectrocyclization (CA-RE) click reactions on an electron-rich alkyne-tetrafunctionalized TPE (TPE-alkyne) using both 1,1,2,2-tetracyanoethene (TCNE), 7,7,8,8-tetracyanoquinodimethane (TCNQ) and 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ) as electron-deficient alkene. Only the starting TPE-alkyne displayed a significant AIE behavior, whereas for TPE-TCNE,a faint effect was observed and for TPE-TCNQ and TPE-F4-TCNQ, no fluorescence was observed in any conditions. The main ICT bands that dominate the UV-Visible absorption spectra underwent a pronounced red-shift beyond the near-infrared (NIR) region for TPE-F4-TCNQ. Based on TD-DFT calculations, it was shown that the ICT character shown by the compounds exclusively originated from the clicked moieties independently of the nature of the central molecular platform. Photothermal (PT) studies conducted on both TPE-TCNQ and TPE-F4-TCNQ in the solid state revealed excellent properties, especially for TPE-F4-TCNQ. These results indicated that CA-RE reaction of TCNQ or F4-TCNQ with donor-substituted are promising candidates for PT applications.

Published
2023

12. Operando acoustic analysis: a valuable method for investigating reaction mechanisms in mechanochemistry

Author

César Leroy, Sébastien Mittelette, Gautier Félix, Nicolas Fabregue, Jessica Špačková, Philippe Gaveau, Thomas-Xavier Métro, and Danielle Laurencin

Subjects
General Chemistry
Abstract

We present a new operando approach for following reactions taking place in mechanochemistry, relying on the analysis of the evolution of the sound during milling. We show that differences in sound can be directly correlated to (physico)chemical changes in the reactor, making this technique attractive and complementary to others for monitoring mechanochemical reactions.

Published
2022

13. Induction-heated ball-milling: a promising asset for mechanochemical reactions

Author

Gautier Félix, Nicolas Fabrègue, César Leroy, Thomas-Xavier Métro, Chia-Hsin Chen, and Danielle Laurencin

Abstract

While ball-milling is becoming one of the common tools used by synthetic chemists, an increasing number of studies highlight that it is possible to further expand the nature and number of products which can be synthesized, by heating the reaction media during mechanochemical reactions. Hence, developing set-ups enabling to combine heating and milling is an important target, which has been looked into in both academic and industrial laboratories. Here, we report a new approach for heating up reaction media during ball-milling reactions, using induction heating (referred to as i-BM). Our set-up is highly attractive not only because it enables a very fast heating of the milling medium (reaching ≈80 °C in just 15 s), and that it is directly adaptable to commercially-available milling equipment, but also because it enables heating either the walls of the milling jars or the beads themselves, depending on the choice of the materials which compose them. Importantly, the possibility to heat a milling medium “from the inside” (when using for example a PMMA jar and stainless steel beads) is a unique feature compared to previously proposed systems. Through extensive numerical simulations, we then show that it is possible to finely tune the properties of this heating system (e.g. heating rate and maximum temperature reached), by playing with the characteristics of the milling system and/or the induction heating conditions used. Lastly, examples of applications of i-BM are given, showing how it can be used to help elucidate reaction mechanisms in ball-milling, to synthesize new molecules, and to control the physical nature of milling media.

Published
2022

14. New Magnetic and Luminescent Dy(III) and Dy(III)/Y(III) Based Tetranuclear Silsesquioxane Cages

Author

Alena N. Kulakova, Luís D. Carlos, Karina Nigoghossian, Victor N. Khrustalev, Yannick Guari, Alexey N. Bilyachenko, Jérôme Long, Joulia Larionova, Elena S. Shubina, Gautier Félix, A. N. Nesmeyanov Institute of Organoelement Compounds (INEOS), Russian Academy of Sciences [Moscow] (RAS), Peoples Friendship University of Russia [RUDN University] (RUDN), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), ND Zelinsky Institute of Organic Chemistry [Moscow, Russia], Department of Physics and CICECO, and Universidade de Aveiro

Subjects
Inorganic Chemistry, chemistry.chemical_compound, chemistry, 010405 organic chemistry, Polymer chemistry, [CHIM.COOR]Chemical Sciences/Coordination chemistry, 010402 general chemistry, Luminescence, Hybrid material, 01 natural sciences, Silsesquioxane, 0104 chemical sciences, 3. Good health
Abstract

International audience; We report here the synthesis, structure, luminescence, and magnetic properties of three new cage-like tetranuclear silsesquioxanes (Et 4 N) 2 [(PhSiO 1..5) 8 (Y 0.75 Dy 0.25 O 1.5) 4 (O)(NO 2.5) 6 (EtOH) 2 (MeCN) 2 ] and (Cat) 2 [(PhSiO 1.5) 8 (DyO 1.5) 4 (O)(NO 2.5) 6 (EtOH) 2 (MeCN) 2 ] (Cat=Et 4 N or Ph 4 P). They present a characteristic greenyellow emission. The Y 3+ /Dy 3+ compound displays in addition a field-induced Single Molecule Magnet (SMM) behavior making it the first reported bifunctional magneto-luminescent silsesquioxane.

Published
2021

15. Temperature sensing in Tb3+/Eu3+-based tetranuclear silsesquioxane cages with tunable emission

Author

Joulia Larionova, Elena S. Shubina, Jérôme Long, Luís D. Carlos, Saad Sene, Gautier Félix, Yannick Guari, Victor N. Khrustalev, Alexey N. Bilyachenko, Karina Nigoghossian, Alena N. Kulakova, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), A. N. Nesmeyanov Institute of Organoelement Compounds (INEOS), Russian Academy of Sciences [Moscow] (RAS), Peoples Friendship University of Russia [RUDN University] (RUDN), Department of Physics and CICECO, and Universidade de Aveiro

Subjects
Materials science, Temperature sensing, General Chemical Engineering, Energy transfer, Analytical chemistry, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 7. Clean energy, 01 natural sciences, Silsesquioxane, 0104 chemical sciences, chemistry.chemical_compound, chemistry, [CHIM]Chemical Sciences, 0210 nano-technology, Luminescence
Abstract

New luminescent cage-like tetranuclear silsesquioxanes [NEt4][(Ph4Si4O8)2(Tb3Eu)(NO3)4(OH)(EtOH)3(H2O)]·4(EtOH) (1) and [NEt4]2[(Ph4Si4O8)2(Tb2Eu2)(NO3)6(EtOH)2(MeCN)2]·4(MeCN) (2) present a tunable thermosensitive Tb3+-to-Eu3+ energy transfer driven by Tb3+ and Eu3+ emission and may be used as temperature sensors operating in the range 41–100 °C with excellent linearity (R2 = 0.9990) and repeatability (>95%). The thermometer performance was evidenced by the maximum relative sensitivity of 0.63% °C−1 achieved at 68 °C.

Published
2021

16. A rational study of the influence of Mn(2+)-insertion in Prussian blue nanoparticles on their photothermal properties

Author

Joulia Larionova, Lamiaa M. A. Ali, Jérôme Long, Mireille Rossel, Fabrice Salles, Saad Sene, Nicolas Cubedo, Maëlle Cahu, Joël Chopineau, Gautier Félix, Magali Gary-Bobo, Mathieu Ciancone, Franck Camerel, Yannick Guari, Jean-Marie Devoisselle, Nadir Bettache, Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Institut des Biomolécules Max Mousseron [Pôle Chimie Balard] (IBMM), 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), Mécanismes moléculaires dans les démences neurodégénératives (MMDN), École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM), The authors thank the University of Montpellier and CNRS for financial support, platform MEA of the University of Montpellier and PAC of ICGM for measurements. This work has been supported by ANR with grant number ANR-18-CE09-0012-01. We acknowledge the imaging facility MRI, member of the national infrastructure France-BioImaging supported by the French National Research Agency (ANR-10-INBS-04, «Investments for the future»). F. C. and J. L. thanks Loïc Charbonnière for his helpful discussions on measurements made in D2O., ANR-18-CE09-0012,NANOBLUE,Nanoparticules de bleu de Prusse pour le théranostic(2018), ANR-10-INBS-0004,France-BioImaging,Développment d'une infrastructure française distribuée coordonnée(2010), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), 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 Montpellier (UM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut National de la Santé et de la Recherche Médicale (INSERM)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), École pratique des hautes études (EPHE), Jonchère, Laurent, APPEL À PROJETS GÉNÉRIQUE 2018 - Nanoparticules de bleu de Prusse pour le théranostic - - NANOBLUE2018 - ANR-18-CE09-0012 - AAPG2018 - VALID, and Développment d'une infrastructure française distribuée coordonnée - - France-BioImaging2010 - ANR-10-INBS-0004 - INBS - VALID

Subjects
inorganic chemicals, Prussian blue, Materials science, Morphology (linguistics), Biomedical Engineering, Pulsed laser irradiation, Nanoparticle, One-Step, 02 engineering and technology, General Chemistry, General Medicine, Photothermal therapy, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, chemistry.chemical_compound, Adsorption, chemistry, [CHIM] Chemical Sciences, [CHIM]Chemical Sciences, General Materials Science, 0210 nano-technology, Triple negative, Nuclear chemistry
Abstract

International audience; We investigated a series of Mn(2+)-Prussian blue (PB) nanoparticles Na(z)Mn(x)Fe(1-x)[Fe(CN)(6)](1-y□y)·nH(2)O of similar size, surface state and cubic morphology with various amounts of Mn(2+) synthesized through a one step self-assembly reaction. We demonstrated by a combined experimental-theoretical approach that during the synthesis, Mn(2+) substituted Fe(3+) up to a Mn/Na-Mn-Fe ratio of 32 at% in the PB structure, while for higher amounts, the Mn(2)[Fe(CN)(6)] analogue is obtained. For comparison, the post-synthetic insertion of Mn2+ in PB nanoparticles was also investigated and completed with Monte-Carlo simulations to probe the plausible adsorption sites. The photothermal conversion efficiency (η) of selected samples was determined and showed a clear dependence on the Mn(2+)amount with a maximum efficiency for a Mn/Na-Mn-Fe ratio of 10 at% associated with a dependence on the nanoparticle concentration. Evaluation of the in vitro photothermal properties of these nanoparticles performed on triple negative human breast adenocarcinoma (MDA-MB-231) cells by using continuous and pulsed laser irradiation confirm their excellent PTT efficiency permitting low dose use.

Published
2021

17. Temperature sensing in Tb

Author

Karina, Nigoghossian, Alena N, Kulakova, Gautier, Félix, Victor N, Khrustalev, Elena S, Shubina, Jérôme, Long, Yannick, Guari, Saad, Sene, Luís D, Carlos, Alexey N, Bilyachenko, and Joulia, Larionova

Abstract

New luminescent cage-like tetranuclear silsesquioxanes [NEt

Published
2021

18. A Novel Approach to the Facile Growth and Organization of Photothermal Prussian Blue Nanocrystals on Different Surfaces

Author

Yannick Guari, Luca Costa, Christophe Dorandeu, Gautier Félix, Pierre-Emmanuel Milhiet, Jean-Marie Devoisselle, Giang Ngo, Joël Chopineau, Joulia Larionova, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Centre de Biochimie Structurale [Montpellier] (CBS), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de la Santé et de la Recherche Médicale (INSERM), Félix, Gautier, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), and Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Nanostructure, General Chemical Engineering, supported lipid bilayers, Nanoparticle, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Article, chemistry.chemical_compound, surface growth, Homogeneity (physics), nanostructures, General Materials Science, Laser power scaling, Lipid bilayer, QD1-999, Prussian blue, [CHIM.MATE] Chemical Sciences/Material chemistry, atomic force microscopy, [CHIM.MATE]Chemical Sciences/Material chemistry, gold surface, Photothermal therapy, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Chemistry, Chemical engineering, chemistry, Nanocrystal, films, 0210 nano-technology
Abstract

We report here a novel “one-pot” approach for the controlled growth and organization of Prussian blue nanostructures on three different surfaces: pure Au0, cysteamine-functionalized Au0, and SiO2-supported lipid bilayers with different natures of lipids. We demonstrate that fine control over the size, morphology, and the degree and homogeneity of the surface coverage by Prussian Blue (PB) nanostructures may be achieved by manipulating different parameters, which are the precursor concentration, the nature of the functional groups or the nature of lipids on the surfaces. This allows the growth of isolated PB nanopyramids and nanocubes or the design of thin dense films over centimeter square surfaces. The formation of unusual Prussian blue nanopyramids is discussed. Finally, we demonstrate, by using experimental techniques and theoretical modeling, that PB nanoparticles deposited on the gold surface exhibit strong photothermal properties, permitting a rapid temperature increase up to 90 °C with a conversion of the laser power of almost 50% for power source heat.

Published
2021

20. New Luminescent Tetranuclear Lanthanide-Based Silsesquioxane Cage-Like Architectures

Author

Jérôme Long, Joulia Larionova, Elena S. Shubina, Alexey N. Bilyachenko, Mikhail M. Levitsky, Gautier Félix, Victor N. Khrustalev, Ekaterina Mamontova, Alena N. Kulakova, Yannick Guari, A. N. Nesmeyanov Institute of Organoelement Compounds (INEOS), Russian Academy of Sciences [Moscow] (RAS), Peoples’ Friendship University of Russia, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), and ND Zelinsky Institute of Organic Chemistry [Moscow, Russia]

Subjects
Lanthanide, 010405 organic chemistry, Organic Chemistry, chemistry.chemical_element, Terbium, General Chemistry, 010402 general chemistry, 01 natural sciences, Catalysis, Silsesquioxane, 3. Good health, 0104 chemical sciences, Crystallography, chemistry.chemical_compound, chemistry, [CHIM]Chemical Sciences, [CHIM.COOR]Chemical Sciences/Coordination chemistry, Europium, Luminescence, Cage
Abstract

International audience; We report on the synthesis, structure, magnetic and luminescence properties investigations of four new cagelike lanthanide-based silsesquioxanes (Cat)2[(PhSiO1.5)8(LnO1.5)4(O)(NO2.5)6(EtOH)2(MeCN)2] (where Cat + = Et4N + , PPh4P + and Ln 3+ = Eu 3+ Tb 3+ and (Ph4P)4[(PhSiO1.5)8(TbO1.5)4(O)2(NO2.5)8]•10MeCN. They present an unusual prism-like topology of cage architectures and lanthanide-characteristic emission, which makes them the first luminescent cage-like lanthanide silsesquioxanes. One of the Tb 3+-based cages presents a magnetic spin-flip transition.

Published
2020

22. Phase Stability of Spin-Crossover Nanoparticles Investigated by Synchrotron Mössbauer Spectroscopy and Small-Angle Neutron Scattering

Author

Elias Angulo-Cervera, Grégory Chaboussant, Léa Godard, Gautier Félix, Dimitrios Bessas, Lionel Salmon, Valerio Cerantola, Azzedine Bousseksou, Mario Piedrahita-Bello, William Nicolazzi, Mirko Mikolasek, Gábor Molnár, Karl Ridier, European Synchrotron Radiation Facility (ESRF), Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay, Mikolasek, M, Ridier, K, Bessas, D, Cerantola, V, Felix, G, Chaboussant, G, Piedrahita-Bello, M, Angulo-Cervera, E, Godard, L, Nicolazzi, W, Salmon, L, Molnar, G, Bousseksou, A, Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and European Commission - SPINSWITCH project (H2020-MSCA-RISE-2016, Grant Agreement No. 734322)

Subjects
Materials science, Small angle neutron scattering, Analytical chemistry, 02 engineering and technology, Neutron scattering, 01 natural sciences, Nanomaterials, law.invention, law, Spin crossover, 0103 physical sciences, Mössbauer spectroscopy, General Materials Science, [CHIM.COOR]Chemical Sciences/Coordination chemistry, Physical and Theoretical Chemistry, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], 010306 general physics, Atmospheric pressure, Transition temperature, nanoparticle, spin transition, 021001 nanoscience & nanotechnology, Small-angle neutron scattering, Synchrotron, diamond anvil cell, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Condensed Matter::Strongly Correlated Electrons, 0210 nano-technology
Abstract

Spin-crossover nanomaterials have been actively studied in the past decade for their potential technological applications in sensing, actuating, and information processing devices. Unfortunately, an increasing number of the metallic centers become inactive at reduced sizes, presumably due to surface effects, limiting their switching ability and thus the scope of applications. Here we report on the investigation of “frozen” metallic centers in nanoparticles (2–80 nm size) of the spin-crossover compound Fe(pyrazine)[Ni(CN)4]. Magnetic measurements reveal both high-spin and low-spin residual fractions at atmospheric pressure. A pressure-induced transition of the high-spin residue is observed at around 1.5 GPa by synchrotron Mössbauer spectroscopy. We show that it is equivalent to a downshift of the transition temperature by ca. 400 K due to the size reduction. Unexpectedly, small-angle neutron scattering experiments demonstrate that these high-spin residual centers are not confined to the surface, which contradicts general theoretical considerations.

Published
2019

23. Controlled Anchoring of Iron Oxide Nanoparticles on Polymeric Nanofibers: Easy Access to Core@Shell Organic-Inorganic Nanocomposites for Magneto-Scaffolds

Author

Benjamin Nottelet, Assala Al Samad, Xavier Dumail, Ryan J. Gilbert, Audrey Bethry, Florence Franconi, Laurent Lemaire, Rebecca D. Pomrenke, Ayman El Jundi, Christopher Johnson, Yannick Guari, Hussein Awada, Danielle Laurencin, Gautier Félix, Joulia Larionova, Institut des Biomolécules Max Mousseron [Pôle Chimie Balard] (IBMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie Inorganique et Matériaux Moléculaires (CIM2), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Micro et Nanomédecines Translationnelles (MINT), Université d'Angers (UA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Plate-forme de Recherche en Imagerie et Spectroscopie Multi-modales (PRISM [SFR ICAT - UA]), SFR UA 4208 Interactions Cellulaires et Applications Thérapeutiques (ICAT), Université d'Angers (UA)-Université d'Angers (UA), Department of Pharmaceutics and Biopharmaceutics, and School of Pharmaceutical Sciences, University of Geneva, University of Lausanne

Subjects
chemistry.chemical_classification, Nanocomposite, Materials science, Scanning electron microscope, Nanotechnology, 02 engineering and technology, Polymer, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, law.invention, chemistry.chemical_compound, chemistry, law, Transmission electron microscopy, Nanofiber, Monolayer, General Materials Science, [CHIM.COOR]Chemical Sciences/Coordination chemistry, Electron microscope, 0210 nano-technology, Iron oxide nanoparticles, ComputingMilieux_MISCELLANEOUS
Abstract

Composites combining superparamagnetic iron oxide nanoparticles (SPIONs) and polymers are largely present in modern (bio)materials. However, although SPIONs embedded in polymer matrices are classically reported, the mechanical and degradation properties of the polymer scaffold are impacted by the SPIONs. Therefore, the controlled anchoring of SPIONs onto polymer surfaces is still a major challenge. Herein, we propose an efficient strategy for the direct and uniform anchoring of SPIONs on the surface of functionalized-polylactide (PLA) nanofibers via a simple free ligand exchange procedure to design PLA@SPIONs core@shell nanocomposites. The resulting PLA@SPIONs hybrid biomaterials are characterized by electron microscopy (scanning electron microscopy and transmission electron microscopy) and energy-dispersive X-ray spectroscopy analysis to probe the morphology and detect elements present at the organic-inorganic interface, respectively. A monolayer of SPIONs with a complete and homogeneous coverage is observed on the surface of PLA nanofibers. Magnetization experiments show that magnetic properties of the nanoparticles are well preserved after their grafting on the PLA fibers and that the size of the nanoparticles does not change. The absence of cytotoxicity, combined with a high sensitivity of detection in magnetic resonance imaging both in vitro and in vivo, makes these hybrid nanocomposites attractive for the development of magnetic biomaterials for biomedical applications.

Published
2019

24. Front Cover: New Luminescent Tetranuclear Lanthanide‐Based Silsesquioxane Cage‐Like Architectures (Chem. Eur. J. 70/2020)

Author

Joulia Larionova, Yannick Guari, Elena S. Shubina, Alena N. Kulakova, Gautier Félix, Victor N. Khrustalev, Jérôme Long, Alexey N. Bilyachenko, Mikhail M. Levitsky, and Ekaterina Mamontova

Subjects
Lanthanide, Organic Chemistry, chemistry.chemical_element, Terbium, General Chemistry, Catalysis, Silsesquioxane, chemistry.chemical_compound, Front cover, chemistry, Polymer chemistry, Europium, Luminescence, Cage
Published
2020

25. Elasticity of Prussian-Blue-Analogue Nanoparticles

Author

Azzedine Bousseksou, Mirko Mikolasek, William Nicolazzi, Gábor Molnár, Jean‐Paul Itié, Gautier Félix, Yannick Guari, Helena J. Shepherd, Jérôme Long, Joulia Larionova, Aleksandr I. Chumakov, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), European Synchrotron Radiation Facility (ESRF), School of Physical Sciences, University of Kent, Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Diffraction, Nanoparticle, 02 engineering and technology, Inelastic scattering, 010402 general chemistry, 01 natural sciences, law.invention, Inorganic Chemistry, Shear modulus, symbols.namesake, law, Elastic modulus, Debye, Condensed matter physics, Chemistry, Structure elucidation, Elastic properties, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Synchrotron, 0104 chemical sciences, Prussian‐blue analogues, Crystallography, Phase transitions, symbols, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Nanoparticles, Particle size, 0210 nano-technology
Abstract

We report on the elastic properties of Ni/[Fe(CN)6] Prussian‐blue‐analogue nanoparticles investigated by high‐pressure synchrotron X‐ray diffraction and nuclear inelastic scattering. For 3 nm and 115 nm particles, we have obtained bulk moduli of (30.3 ± 3.8) GPa and (24.5 ± 3.2) GPa, with Debye sound velocities of (2496 ± 46) m s–1 and (2407 ± 38) m s–1, respectively. Combining these results, Poisson's ratio, Young's modulus, the shear modulus, and the transversal/longitudinal sound velocities have been calculated for each particle size. All of these physical quantities suggest a stiffening of the lattice when the particle size decreases, which is mainly attributed to the reduction of iron ions on the particle surface.\ud \ud The elastic behavior of Prussian‐blue‐analogue nanoparticles has been investigated, using high‐pressure synchrotron X‐ray diffraction and nuclear‐inelastic‐scattering techniques. We have extracted all of the elastic moduli for different sizes of Prussian‐blue‐analogue nanoparticles. This result is the basis for understanding electron–lattice coupling phase transitions at the nanoscale.

Published
2018

26. Magnetic Susceptibility Study of Sub-Pico-emu Sample Using a Micromagnetometer: An Investigation through Bistable Spin-Crossover Materials

Author

Azzedine Bousseksou, Lionel Salmon, Souleymane Kamara, Kunwoo Kim, Vincent Davesne, CheolGi Kim, Ferial Terki, Quang-Hung Tran, Gautier Félix, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Deagu Gyeongbuk Institute of Science and Technology (DGIST)

Subjects
Materials science, Magnetoresistance, Condensed matter physics, Bistability, Magnetism, Mechanical Engineering, Biasing, 02 engineering and technology, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Magnetic susceptibility, 0104 chemical sciences, Magnetic field, Spin‐crossover, Mechanics of Materials, Spin crossover, Magneto‐resistive sensors, Self‐magnetic field, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Particle, General Materials Science, 0210 nano-technology
Abstract

International audience; A promising and original method to study the spin‐transition in bistable spin‐crossover (SCO) materials using a magnetoresistive multiring sensor and its self‐generated magnetic field is reported. Qualitative and quantitative studies are carried out combining theoretical and experimental approaches. The results show that only a small part of matter dropped on the sensor surface is probed by the device. At a low bias‐current range, the number of detected nanoparticles depends on the amplitude of the current. However, in agreement with the theoretical model, the stray voltage from the particles is proportional to the current squared. By changing both the bias current and the concentration of particle droplet, the thermal hysteresis of an ultrasmall volume, 1 × 10−4 mm3, of SCO particles is measured. The local probe of the experimental setup allows a highest resolution of 4 × 10−14 emu to be reached, which is never achieved by experimental methods at room temperature.

Published
2017

27. Spin‐Crossover Materials: Magnetic Susceptibility Study of Sub‐Pico‐emu Sample Using a Micromagnetometer: An Investigation through Bistable Spin‐Crossover Materials (Adv. Mater. 46/2017)

Author

Souleymane Kamara, Ferial Terki, Kunwoo Kim, Gautier Félix, Azzedine Bousseksou, CheolGi Kim, Lionel Salmon, Vincent Davesne, and Quang-Hung Tran

Subjects
Materials science, Condensed matter physics, Bistability, Mechanics of Materials, Spin crossover, Mechanical Engineering, General Materials Science, Sample (graphics), Magnetic susceptibility
Published
2017

28. Tuning the spin crossover in nano-objects: From hollow to core–shell particles

Author

William Nicolazzi, Azzedine Bousseksou, Mirko Mikolasek, Gábor Molnár, Gautier Félix, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Condensed matter physics, Chemistry, Astrophysics::High Energy Astrophysical Phenomena, Transition temperature, Nuclear Theory, Shell (structure), Spin transition, General Physics and Astronomy, [CHIM.MATE]Chemical Sciences/Material chemistry, Core (optical fiber), Hysteresis, Lattice constant, Spin crossover, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Physics::Atomic and Molecular Clusters, Astrophysics::Solar and Stellar Astrophysics, Particle, Physical and Theoretical Chemistry
Abstract

International audience; Core-shell nanoparticles displaying spin crossover (SCO) effect on the shell and/or on the core are studied using Monte Carlo simulations of an elastic microscopic Ising-like model. In this Letter we demonstrate that the SCO transition temperature can be controlled by adjusting the width of the shell and the width of the core as well as the misfit between the lattice constants. An original coupled system with a SCO active shell and an active core with another SCO material is proposed. Inducing the transition of the core by the spin transition of the shell results in a hysteresis in the thermal spin transition of the shell. This new type of memory effect in SCO compounds is based on the engineering of particle morphology.

Published
2014

29. Tunable vegetable oil/silica hybrid microparticles for poorly water-soluble drug delivery

Author

Vincent Lapinte, Philippe Gaveau, Anne Aubert-Pouëssel, Thomas Cacciaguerra, Jean-Jacques Robin, Jean-Marie Devoisselle, Gautier Félix, Joël Chopineau, Koceïla Doufène, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), and Université de Nîmes (UNIMES)

Subjects
Castor Oil, Silylation, Cell Survival, Administration, Oral, Pharmaceutical Science, Ibuprofen, [CHIM.THER]Chemical Sciences/Medicinal Chemistry, 02 engineering and technology, 030226 pharmacology & pharmacy, Mice, 03 medical and health sciences, Hydrolysis, 0302 clinical medicine, medicine, Animals, Humans, [CHIM]Chemical Sciences, Fourier transform infrared spectroscopy, ComputingMilieux_MISCELLANEOUS, Sol-gel, Drug Carriers, Chemistry, Anti-Inflammatory Agents, Non-Steroidal, Water, Biodegradation, Silicon Dioxide, 021001 nanoscience & nanotechnology, Drug Liberation, Vegetable oil, Solubility, Chemical engineering, Castor oil, Emulsion, NIH 3T3 Cells, Caco-2 Cells, 0210 nano-technology, medicine.drug
Abstract

To encapsulate and deliver poorly water-soluble drugs, castor oil/silica hybrid microparticles (HMP)s were synthesized. Green chemistries were used to silylate the oil and further cross-link it into solid microparticles by sol-gel reaction. Silylated castor oils (ICO)s at various silylation ratios were prepared and allowed the solubilization of ibuprofen at several concentrations up to 16 wt%. The HMPs were formulated by ThermoStabilized Emulsion (TSE) process which permits to “freeze” the oil-in-water emulsion while the sol-gel reaction occurs. The hybrid mineral/organic composition and the morphology (spherical shape and micrometric size) of these HMPs were determined by complementary technics (SEM, TGA, EDX, 29Si NMR and FTIR spectroscopies). The HMPs reached a good ibuprofen loading efficiency regardless to the formulation used while the release kinetics in simulated oral administration exhibited a tunable release during 3 h according to the silylation ratio. The ibuprofen rate also influenced its own amorphous or crystalline character within the HMPs. For subcutaneous conditions, ibuprofen release took place over 15 days. Finally, biodegradability assays in simulated digestion medium suggested a surface-limited hydrolysis of the particles and cytocompatibility studies on NIH-3T3 and Caco-2 cells demonstrated an excellent cellular viability.

Published
2019

30. Study of the influence of magnetic dilution over relaxation processes in a Zn/Dy single-ion magnet by correlation between luminescence and magnetism

Author

Jérôme Long, Luís D. Carlos, Rute A. S. Ferreira, Dominique Luneau, Liviu F. Chibotaru, Joulia Larionova, Veacheslav Vieru, Gautier Félix, Ekaterina Mamontova, Yannick Guari, Vania T. Freitas, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Universidade de Aveiro, Laboratoire des Multimatériaux et Interfaces (LMI), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institute for Nanoscale Physics and Chemistry (INPAC), Université Catholique de Louvain = Catholic University of Louvain (UCL), Division of Quantum and Chemistry, Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), and Department of Physics and CICECO

Subjects
Magnetism, General Chemical Engineering, SPIN-LATTICE-RELAXATION, MOLECULE MAGNETS, SLOW RELAXATION, URANIUM(III) COMPLEXES, MONONUCLEAR DYSPROSIUM COMPLEX, 010402 general chemistry, 01 natural sciences, Magnetization, Ab initio quantum chemistry methods, LANTHANIDE COMPLEXES, [CHIM.COOR]Chemical Sciences/Coordination chemistry, Spectroscopy, Quantum tunnelling, ANISOTROPY, Condensed matter physics, 010405 organic chemistry, Chemistry, Relaxation (NMR), SMM BEHAVIOR, General Chemistry, 0104 chemical sciences, 2ND EXCITED-STATE, Magnet, Luminescence, ENERGY-TRANSFER
Abstract

© 2016 The Royal Society of Chemistry. We investigate the magnetic dilution effect on the relaxation mechanisms and the estimation of the energy barrier in a photo-luminescent Dy(III)/Y(III) based Single-Ion Magnet (SIM). The photo-luminescent spectroscopy permits the careful determination of the Orbach barrier, which is in a good agreement with the ab initio calculations. This barrier does not change upon magnetic dilution. The magnetic properties investigations highlight that the determination of the energy barrier is affected by magnetic dilution due to the changes in Quantum Tunnelling of the Magnetization (QTM). ispartof: RSC Advances vol:6 issue:110 pages:108810-108818 status: published

Published
2016

31. Surface Plasmons Reveal Spin Crossover in Nanometric Layers

Author

William Nicolazzi, Tarik Mahfoud, Gábor Molnár, Azzedine Bousseksou, Gautier Félix, Lionel Salmon, Khaldoun Abdul-Kader, Il'ya A. Gural'skiy, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Condensed matter physics, Chemistry, Surface plasmon, Physics::Optics, Nanotechnology, [CHIM.MATE]Chemical Sciences/Material chemistry, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Biochemistry, Surface plasmon polariton, Catalysis, 0104 chemical sciences, Colloid and Surface Chemistry, Dielectric layer, Spin crossover, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Condensed Matter::Strongly Correlated Electrons, Nanometre, Thin film, 0210 nano-technology
Abstract

International audience; Nano-objects and thin films displaying molecular spin-crossover phenomena have recently attracted much attention. However, the investigation of spin crossover at reduced sizes is still a big challenge. Here we demonstrate that surface plasmon polariton waves propagating along the interface between a metal and a dielectric layer can be used to detect the spin-state changes in the latter with high sensitivity, even at the nanometer scale.

Published
2011

32. Lattice dynamics in spin-crossover nanoparticles through nuclear inelastic scattering

Author

Haonan Peng, Azzedine Bousseksou, Aleksandr I. Chumakov, William Nicolazzi, Lionel Salmon, Gautier Félix, Mirko Mikolasek, Gábor Molnár, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), European Synchrotron Radiation Facility (ESRF), Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM), and Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Quasielastic scattering, Mössbauer effect, Lattice (group), Spin transition, PACS: 64.70.Nd, 63.22.−m, 75.30.Wx, 76.80.+y, [CHIM.MATE]Chemical Sciences/Material chemistry, Inelastic scattering, Condensed Matter Physics, Spectral line, Electronic, Optical and Magnetic Materials, Octahedron, Spin crossover, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Atomic physics
Abstract

We used nuclear inelastic scattering (NIS) to investigate the lattice dynamics in [Fe(pyrazine)(Ni(CN)${}_{4})]$ spin crossover nanoparticles. The vibrational density of states of iron was extracted from the NIS data, which allowed to determine characteristic thermodynamical and lattice dynamical parameters as well as their spin-state dependence. The optical part of the NIS spectra compares well with the Raman scattering data reflecting the expansion/contraction of the coordination octahedron during the spin transition. From the acoustic part, we extracted the sound velocity in the low-spin $({v}_{\mathrm{LS}}=2073\ifmmode\pm\else\textpm\fi{}31$ m ${\mathrm{s}}^{\ensuremath{-}1})$ and high-spin $({v}_{\mathrm{HS}}=1942\ifmmode\pm\else\textpm\fi{}23$ m ${\mathrm{s}}^{\ensuremath{-}1})$ states of the particles. The spin-state dependence of this parameter is of primary interest to rationalize the spin-transition behavior in solids as well as its dynamics and finite size effects.

Published
2015

33. Hybrid spin-crossover nanostructures

Author

Azzedine Bousseksou, Lionel Salmon, Iurii Suleimanov, Carlos M. Quintero, Gautier Félix, Gábor Molnár, William Nicolazzi, José Sánchez Costa, Équipe NanoBioSystèmes (LAAS-NBS), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), National Taras Shevchenko University of Kiev, Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Nanostructure, General Physics and Astronomy, Nanoparticle, Nanotechnology, Review, lcsh:Chemical technology, 010402 general chemistry, lcsh:Technology, 01 natural sciences, Nanomaterials, multifunctionality, Spin crossover, lcsh:TP1-1185, General Materials Science, Electrical and Electronic Engineering, Thin film, lcsh:Science, nanomaterials, core-shell particle, lcsh:T, 010405 organic chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, lcsh:QC1-999, 0104 chemical sciences, Nanoscience, spin-crossover, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], lcsh:Q, core–shell particle, lcsh:Physics
Abstract

International audience; This review reports on the recent progress in the synthesis, modelling and application of hybrid spin-crossover materials, includingcore–shell nanoparticles and multilayer thin films or nanopatterns. These systems combine, often in synergy, different physicalproperties (optical, magnetic, mechanical and electrical) of their constituents with the switching properties of spin-crossovercomplexes, providing access to materials with unprecedented capabilities.

Published
2014

34. Re-Appearance of Cooperativity in Ultra-Small Spin-Crossover [Fe(pz){Ni(CN) 4 }] Nanoparticles

Author

Haonan Peng, Gautier Félix, Simon Tricard, Lionel Salmon, Gábor Molnár, William Nicolazzi, Azzedine Bousseksou, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique et chimie des nano-objets (LPCNO), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), and Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Spin transition, Nanoparticle, 010402 general chemistry, 01 natural sciences, Catalysis, transition metals, symbols.namesake, Nuclear magnetic resonance, Transition metal, spin crossover, Spin crossover, Mössbauer spectroscopy, Debye temperature, [CHIM]Chemical Sciences, Spectroscopy, Debye model, Condensed matter physics, 010405 organic chemistry, Chemistry, General Chemistry, General Medicine, 0104 chemical sciences, Hysteresis, symbols, nanoparticles
Abstract

International audience; A reverse nanoemulsion technique was used for the elaboration of [Fe(pz){Ni(CN)4}] nanoparticles. Low‐temperature micellar exchange made it possible to elaborate ultra‐small nanoparticles with sizes down to 2 nm. When decreasing the size of the particles from 110 to 12 nm the spin transition shifts to lower temperatures, becomes gradual, and the hysteresis shrinks. On the other hand, a re‐opening of the hysteresis was observed for smaller (2 nm) particles. A detailed 57Fe Mössbauer spectroscopy analysis was used to correlate this unusual phenomenon to the modification of the stiffness of the nanoparticles thanks to the determination of their Debye temperature.

Published
2014

37. Non-extensivity of thermodynamics at the nanoscale in molecular spin crossover materials: a balance between surface and volume

Author

Mirko Mikolasek, Gábor Molnár, Gautier Félix, William Nicolazzi, Azzedine Bousseksou, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Chemistry, Transition temperature, Monte Carlo method, Intermolecular force, Spin transition, General Physics and Astronomy, Nanoparticle, Thermodynamics, [CHIM.MATE]Chemical Sciences/Material chemistry, Rigidity (electromagnetism), Surface-area-to-volume ratio, Spin crossover, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Physical and Theoretical Chemistry
Abstract

International audience; The spin transition behavior in nanoparticles of molecular spin crossover (SCO) materials is investigated theoretically using a two-variable microscopic Ising-like model solved by Monte Carlo simulations. The extensive nature of the energy, and therefore the whole thermodynamics is affected by the increasing role of surface energetic parameters. As a consequence the pressure inside the nanoparticle is different from the external pressure of the bath. The difference of the surface energies between the low spin (LS) and the high spin (HS) states is the origin of the modification of the SCO properties at finite sizes (downshift of the transition temperature and loss of the hysteresis). On the other hand, the extensivity of the system can be controlled by the form of the nanoparticle. Hollow particles allow control of the surface to volume ratio. An important consequence of this effect is the conservation of the SCO properties as a function of size. A modification of the intermolecular interactions at the surface leads to a modification of the surface rigidity, and will impact also on the extensivity of the system. When increasing/decreasing the surface rigidity the global elasticity of the nanoparticle raises/decreases and enhances/reduces the cooperativity of the SCO material.

Published
2014

38. Role of surface vibrational properties on cooperative phenomena in spin-crossover nanomaterials

Author

Ferial Terki, William Nicolazzi, Azzedine Bousseksou, Gautier Félix, Mirko Mikolasek, Gábor Molnár, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), and Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Condensed matter physics, Monte Carlo method, Spin transition, Nanoparticle, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Nanomaterials, symbols.namesake, Spin crossover, symbols, Hardening (metallurgy), [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Physical chemistry, Spectroscopy, Debye model
Abstract

The influence of surface/interface on the lattice dynamics of spin crossover nanoparticles has been investigated by a spring-ball model solved by Monte Carlo methods. The bond cohesion energy of the model has been extracted from M\"ossbauer spectroscopy measurements performed on the model compound ${\mathrm{Ni}}_{3}[\mathrm{Fe}{(\mathrm{CN})}_{6}]$. We show that the coupling between bulk and surface vibrational properties, which drastically affects the mechanical properties of the whole particle below a characteristic size, has a major impact on the phase stability of the particles. In the case of free surfaces, the Debye temperature decreases with the size and the first-order nature of the spin transition disappears. On the other hand, a hardening of the surface bonds leads to increasing particle stiffness with the size reduction. In this case, a persistence of the hysteretic behavior in the spin transition curve is also predicted in good agreement with previous theoretical and experimental results.

Published
2014

39. Finite size effects in molecular spin crossover materials

Author

Azzedine Bousseksou, William Nicolazzi, Gautier Félix, Mirko Mikolasek, Gábor Molnár, Lionel Salmon, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Phase transition, Bistability, Condensed matter physics, Chemistry, Transition temperature, Spin transition, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Catalysis, 0104 chemical sciences, Hysteresis, Spin crossover, Atomic electron transition, Materials Chemistry, [CHIM.COOR]Chemical Sciences/Coordination chemistry, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], 0210 nano-technology, Size dependence
Abstract

International audience; In recent years, study of nano-objects with first-order phase transitions has raised new interesting questions. Indeed, the phase stability and the transformation kinetics are highly dependent on the object size. In the case of the spin crossover phenomenon size effects may lead to a loss of the hysteresis (bistability) properties, a shift of the transition temperature or the occurrence of an incomplete transition and also reappearance of the hysteresis upon extreme size reduction (∼1–4 nm). Research in this area is growing, but the mechanisms of the spin transition at the nanoscale and in particular the size dependence of the collective behaviour are still not completely understood. The aim of this Focus paper is to point out new issues brought about by the size-reduction effects. We also review size-induced effects for a few selected phase transition phenomena, such as structural or electronic transitions, with the aim of highlighting the possible analogies with the spin crossover phenomenon.

Published
2014

40. Enhanced Cooperative Interactions at the Nanoscale in Spin-Crossover Materials with a First-Order Phase Transition

Author

Gábor Molnár, Gautier Félix, Azzedine Bousseksou, Jérôme Long, William Nicolazzi, Guillaume Maurin, Yannick Guari, Joulia Larionova, Marine Perrier, Lionel Salmon, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Chimie moléculaire et organisation du solide (CMOS), Université Montpellier 2 - Sciences et Techniques (UM2)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie de Toulouse (ICT), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), and Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Phase transition, Materials science, Condensed matter physics, Transition temperature, Spin transition, General Physics and Astronomy, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Hysteresis, symbols.namesake, Spin crossover, symbols, [CHIM.COOR]Chemical Sciences/Coordination chemistry, Particle size, 0210 nano-technology, Elastic modulus, Debye model
Abstract

International audience; We analyzed the size effect on a first-order spin transition governed by elastic interactions. This study was performed in the framework of a nonextensive thermodynamic core-shell model. When decreasing the particle size, differences in surface energies between the two phases lead to the shrinking of the thermal hysteresis width, the lowering of the transition temperature, and the increase of residual fractions at low temperature, in good agreement with recent experimental observations on spin transition nanomaterials. On the other hand, a modification of the particle-matrix interface may allow for the existence of the hysteresis loop even at very low sizes. In addition, an unexpected reopening of the hysteresis, when the size decreases, is also possible due to the hardening of the nanoparticles at very small sizes, which we deduced from the size dependence of the Debye temperature of a series of coordination nanoparticles.

Published
2013

41. Guide d'utilisation de l'outil Trajectoire

Author

Cecile Fiorelli, Sophie Chaxel, Pierre Gasselin, Pascale Moity Maïzi, Gautier Félix, Guillaume Massein, Maxime Pigache, Yann Vétois, Mutations des activités des espaces et des formes d'organisation dans les territoires ruraux (METAFORT), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut National de la Recherche Agronomique (INRA)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-AgroParisTech, Innovation et Développement dans l'Agriculture et l'Agro-alimentaire (Innovation), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre national d'études agronomiques des régions chaudes (CNEARC)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Centre International de Hautes Etudes Agronomiques Méditerranéennes - Institut Agronomique Méditerranéen de Montpellier (CIHEAM-IAMM), Centre International de Hautes Études Agronomiques Méditerranéennes (CIHEAM)-Centre International de Hautes Études Agronomiques Méditerranéennes (CIHEAM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Innovation et Développement dans l'Agriculture et l'Alimentation (UMR Innovation), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Association Départementale de Développement de l’Emploi Agricole et Rural du Gard (ADDEARG), Association pour le Développement de l'Emploi Agricole et Rural de l'Aude (ADEAR 11), PSDR 3 Languedoc-Roussillon (Pour et Sur le Développement Régional). Projet INTERSAMA L’insertion territoriale des systèmes d’activités des ménages agricoles, Pierre Gasselin, Hélène Tallon, Mathieu Dalmais, Cécile Fiorelli, Mutations des activités des espaces et des formes d'organisation dans les territoires ruraux ( METAFORT ), Institut National de la Recherche Agronomique ( INRA ) -AgroParisTech-VetAgro Sup ( VAS ) -Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture ( IRSTEA ) -AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Innovation et Développement dans l'Agriculture et l'Agro-alimentaire ( Innovation ), Centre de Coopération Internationale en Recherche Agronomique pour le Développement ( CIRAD ) -Centre national d'études agronomiques des régions chaudes ( CNEARC ) -Institut National de la Recherche Agronomique ( INRA ) -Centre international d'études supérieures en sciences agronomiques ( Montpellier SupAgro ) -IAMM-Institut national d’études supérieures agronomiques de Montpellier ( Montpellier SupAgro ), Innovation et Développement dans l'Agriculture et l'Alimentation ( UMR Innovation ), Institut national d’études supérieures agronomiques de Montpellier ( Montpellier SupAgro ) -Centre international d'études supérieures en sciences agronomiques ( Montpellier SupAgro ) -Institut National de la Recherche Agronomique ( INRA ) -Centre de Coopération Internationale en Recherche Agronomique pour le Développement ( CIRAD ), Association Départementale de Développement de l’Emploi Agricole et Rural du Gard ( ADDEARG ), Association pour le Développement de l'Emploi Agricole et Rural de l'Aude ( ADEAR 11 ), Mutations des activités des espaces et des formes d'organisation dans les territoires ruraux (UMR METAFORT), Institut National de la Recherche Agronomique (INRA)-AgroParisTech-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Innovation et Développement dans l'Agriculture et l'Agro-alimentaire (UMR Innovation), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut National de la Recherche Agronomique (INRA)-AgroParisTech-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, AgroParisTech-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Recherche Agronomique (INRA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), and 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)

Subjects
accompagnement, cartographie cognitive, [ SDV ] Life Sciences [q-bio], [SDV]Life Sciences [q-bio], accompagnement des acteurs, installation des agriculteurs, entretien compréhensif, boite à outil, trajectoire d'exploitation
Abstract

Trajectoire est un outil qui consiste à faire raconter à un porteur de projet son parcours de vie, puis à reconstruire la trajectoire de création ou de développement de son activité. Il vise ensuite à identifier les motivations qui l’amènent à vouloir s’installer en agriculture, ainsi que ses forces acquises au cours de ses expériences et ses faiblesses pour mener à bien son projet. L’outil Trajectoire, conçu et expérimenté dans des situations d’installation en agriculture, nous semble cependant pouvoir être utilisé dans toute situation de création ou de développement d’activités.

Published
2013

42. Bistable photonic nanostructures based on molecular spin crossover complexes

Author

Il'ya A. Gural'skyi, Tarik Mahfoud, Azzedine Bousseksou, Christophe Vieu, William Nicolazzi, Lionel Salmon, Carlos Quintero, Christian Bergaud, Khaldoun Abdul-Kader, Gautier Félix, Amal Akou, Christophe Thibault, Gábor Molnár, Carlos Bartual-Murgui, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Équipe NanoBioSystèmes (LAAS-NBS), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Matériaux Moléculaires Commutables (LCC) (Equipe P), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Équipe Ingénierie pour les sciences du vivant (LAAS-ELIA), Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie de Toulouse (ICT)

Subjects
Diffraction, Materials science, Bistability, bistability, Physics::Optics, Nanotechnology, 02 engineering and technology, Grating, 010402 general chemistry, 7. Clean energy, 01 natural sciences, Spin crossover, Thin film, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Diffraction grating, Plasmon, molecular spin crossover, business.industry, nano-patterning, surface plasmons, diffraction gratings, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Optoelectronics, fluorescence, Photonics, 0210 nano-technology, business
Abstract

International audience; In this paper we discuss the elaboration, optical properties and possible applications of thin films and nano-patterns of molecular spin crossover complexes. These bistable nanostructures can respond reversibly with fast response times to various external stimuli, such as temperature changes, application of an external pressure, light irradiation or exposure to gas/vapor molecules. The response can be either transient (gating) or non-volatile (switching) depending on the experimental conditions. We show that these assets provide a very appealing scope for a variety of applications including tunable photonic devices, thermal imaging and chemical sensors. In particular, we discuss three photonic application principles based on fluorescence energy transfer, grating diffraction and guided plasmon-polariton waves.

Published
2012

43. A simple approach for controlled deposition of Prussian blue analogue nanoparticles on a functionalised plasmonic gold surface

Author

Jérôme Long, Gautier Félix, Joulia Larionova, V Oscar Saavedra, Jean-Marie Devoisselle, Luca Costa, Giang Ngo, Yannick Guari, Pierre-Emmanuel Milhiet, Joël Chopineau, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Centre de Biochimie Structurale [Montpellier] (CBS), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de la Santé et de la Recherche Médicale (INSERM), and Université de Nîmes (UNIMES)

Subjects
Prussian blue, Atomic force microscopy, Nanoparticle, Nanotechnology, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Catalysis, 0104 chemical sciences, chemistry.chemical_compound, chemistry, Monolayer, Materials Chemistry, Deposition (phase transition), [CHIM.COOR]Chemical Sciences/Coordination chemistry, Gold surface, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], 0210 nano-technology, Surface plasmon resonance spectroscopy, Plasmon
Abstract

International audience; We report here a simple and efficient approach for the controlled deposition of a monolayer of Prussian blue analogue nanoparticles on a gold surface functionalised with amino groups and their characterisation by surface plasmon resonance spectroscopy and atomic force microscopy combined with theoretical modeling.

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44. De l'amour / Charles Baudelaire

Author

Baudelaire, Charles (1821-1867). Auteur du texte, Gautier, Félix-François. Auteur du texte, Baudelaire, Charles (1821-1867). Auteur du texte, and Gautier, Félix-François. Auteur du texte

Abstract

Comprend : La vie amoureuse de Baudelaire, Contient une table des matières

Published
1919

46. Manuscrits de la médiathèque centrale Emile Zola (Montpellier). Supplément. Fonds numérisés (ms 65-...). Correspondance de Georges d'<Albenas (1827-1914). Lettre à Georges d'Albenas (1827-1914)

Author

Albenas, Georges d . Destinataire de lettres, Gautier, Félix-François. Auteur de lettres, Albenas, Georges d . Destinataire de lettres, and Gautier, Félix-François. Auteur de lettres

Abstract

Numérisation effectuée à partir d'un document original : MS0569-47., Appartient à l'ensemble documentaire : 3M000, Appartient à l'ensemble documentaire : 3M016, Appartient à l'ensemble documentaire : 3M018, Gautier, Félix-François., Albenas, Georges d ., Paris (France)., Lieu de copie : Paris

47. Spin crossover in Fe(triazole)-Pt nanoparticle self-assembly structured at the sub-5 nm scale

Author

Usmani S., Mikolasek M., Gillet A., Sanchez Costa J., Rigoulet M., Chaudret B., Bousseksou A., Lassalle-Kaiser B., Demont P., Molnár G., Salmon L., Carrey J., Tricard S. and We thank Marc Respaud and Sébastien Pinaud for their significant help in magnetic measurements. We also thank Sébastien Cher for experimental support, Thomas Blon for gold evaporation on substrates and Gautier Félix for insightful discussions. We acknowledge SOLEIL for provision of synchrotron radiation facilities on the LUCIA beamline. Financial support from Agence Nationale de la Recherche (PhoCatSA grant ANR-10-LABX-0037-NEXT, MOSC grant ANR-18-CE09-0007 and Nanohybrid grant ANR-13-BS07-0020-01), from the Marie-Curie research program (NanoSCOpe 328078) and from the Indo-French Centre for the Promotion of Advanced Research – CEFIPRA is acknowledged. This study has been partially supported through the EUR grant NanoX n° ANR-17-EURE-0009 in the framework of the Programme des Investissements d’Avenir. JSC is grateful to the Spanish MINECO through National Research Project (CTQ2016-80635-P) and the Ramon y Cajal Research program (RYC-2014-16866).

Published
2020

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