6 results on '"Mathias Urbain"'
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2. Gold-seeded Lithium Niobate Nanoparticles: Influence of Gold Surface Coverage on Second Harmonic Properties
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Ana-María Pablo-Sainz-Ezquerra, Mathias Urbain, Iryna Kandybka, Rachael Taitt, Yannick Mugnier, Christelle Yeromonahos, Yann Chevolot, Zacharie Behel, Ronan Le Dantec, Virginie Monnier, Nicolas Martinez-Rodriguez, Sandrine Beauquis, Pierre-François Brevet, Eloïse Millet, Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), INL - Chimie et Nanobiotechnologies (INL - C&N), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Laboratoire SYstèmes et Matériaux pour la MEcatronique (SYMME), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Institut Lumière Matière [Villeurbanne] (ILM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Optique non linéaire et interfaces (ONLI), and Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL)
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Technology ,IRON-OXIDE ,General Chemical Engineering ,Chemistry, Multidisciplinary ,Lithium niobate ,Analytical chemistry ,Nanoparticle ,hyperpolarizability ,02 engineering and technology ,01 natural sciences ,lcsh:Chemistry ,chemistry.chemical_compound ,plasmon ,ZNO ,General Materials Science ,chemistry.chemical_classification ,Physics ,lithium niobate ,Polymer ,[CHIM.MATE]Chemical Sciences/Material chemistry ,OPTICAL-PROPERTIES ,021001 nanoscience & nanotechnology ,[SDV.BBM.BP]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biophysics ,[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry ,Chemistry ,Physical Sciences ,Science & Technology - Other Topics ,0210 nano-technology ,Materials science ,[PHYS.PHYS.PHYS-BIO-PH]Physics [physics]/Physics [physics]/Biological Physics [physics.bio-ph] ,Materials Science ,Hyperpolarizability ,Materials Science, Multidisciplinary ,1ST HYPERPOLARIZABILITY ,NANOWIRES ,010402 general chemistry ,Article ,Physics, Applied ,X-ray photoelectron spectroscopy ,surface ,Surface charge ,Nanoscience & Nanotechnology ,Plasmon ,Science & Technology ,second harmonic generation ,Second-harmonic generation ,gold seeds ,[INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation ,0104 chemical sciences ,chemistry ,lcsh:QD1-999 ,[PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph] ,CLUSTERS ,GENERATION - Abstract
Hybrid nanoparticles composed of an efficient nonlinear optical core and a gold shell can enhance and tune the nonlinear optical emission thanks to the plasmonic effect. However the influence of an incomplete gold shell, i.e., isolated gold nano-islands, is still not well studied. Here LiNbO3 (LN) core nanoparticles of 45 nm were coated with various densities of gold nano-seeds (AuSeeds). As both LN and AuSeeds bear negative surface charge, a positively-charged polymer was first coated onto LN. The number of polymer chains per LN was evaluated at 1210 by XPS and confirmed by fluorescence titration. Then, the surface coverage percentage of AuSeeds onto LN was estimated to a maximum of 30% using ICP-AES. The addition of AuSeeds was also accompanied with surface charge reversal, the negative charge increasing with the higher amount of AuSeeds. Finally, the first hyperpolarizability decreased with the increase of AuSeeds density while depolarization values for Au-seeded LN were close to the one of bare LN, showing a predominance of the second harmonic volumic contribution. ispartof: NANOMATERIALS vol:11 issue:4 ispartof: location:Switzerland status: published
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- 2021
3. On the Reaction Pathways and Growth Mechanisms of LiNbO3 Nanocrystals from the Non-Aqueous Solvothermal Alkoxide Route
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Sandrine Beauquis, Jean-Christophe Marty, Christiane Durand, Ronan Le Dantec, Yannick Mugnier, Mathias Urbain, Florian Riporto, Virginie Monnier, Yann Chevolot, Christine Galez, Laboratoire SYstèmes et Matériaux pour la MEcatronique (SYMME), and Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])
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Materials science ,General Chemical Engineering ,Nucleation ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Article ,lcsh:Chemistry ,Colloid ,chemistry.chemical_compound ,Dynamic light scattering ,Zeta potential ,General Materials Science ,size and shape control ,reaction pathways and growth mechanisms ,Aqueous solution ,[CHIM.MATE]Chemical Sciences/Material chemistry ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,3. Good health ,Monomer ,lcsh:QD1-999 ,chemistry ,Nanocrystal ,Chemical engineering ,alkoxide precursors ,lithium niobate nanocrystals ,Alkoxide ,non-aqueous solvothermal conditions ,0210 nano-technology - Abstract
Phase-pure, highly crystalline sub-50 nm LiNbO3 nanocrystals were prepared from a non-aqueous solvothermal process for 72 h at 230 °, C and a commercial precursor solution of mixed lithium niobium ethoxide in its parent alcohol. A systematic variation of the reaction medium composition with the addition of different amounts of co-solvent including butanol, 1,3-propanediol, 1,4-butanediol, and 1,5-pentanediol resulted in the formation of nanocrystals of adjustable mean size and shape anisotropy, as demonstrated from XRD measurements and TEM imaging. Colloidal stability of ethanol- and water-based suspensions was evaluated from dynamic light scattering (DLS)/zeta potential studies and correlated with FTIR data. Thanks to the evolution in the nanocrystal size and shape distribution we observed, as well as to the available literature on the alkoxide chemistry, the reaction pathways and growth mechanisms were finally discussed with a special attention on the monomer formation rate, leading to the nucleation step. The polar, non-perovskite crystalline structure of LiNbO3 was also evidenced to play a major role in the nanocrystal shape anisotropy.
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- 2021
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4. Image Correlation Spectroscopy with Second Harmonic Generating Nanoparticles in Suspension and in Cells
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Luigi Bonacina, Mathias Urbain, Yannick Mugnier, Ali Yasin Sonay, Hannelore Bové, Eli Slenders, Pieter Vanden Berghe, Periklis Pantazis, Martin vandeVen, Marcel Ameloot, Hasselt University (UHasselt), Laboratoire SYstèmes et Matériaux pour la MEcatronique (SYMME), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Department of Biosystems Science and Engineering [ETH Zürich] (D-BSSE), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Group of Applied Physics [Geneva] (GAP), University of Geneva [Switzerland], Translational Research Center for Gastrointestinal Disorders, Technologie campus Gent - KU Leuven (KU Leuven), Laboratory for Fluorescence Dynamics [Irvine], University of California [Irvine] (UCI), and University of California-University of California
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DYNAMICS ,0301 basic medicine ,Technology ,Nonlinear optics ,Niobium ,Analytical chemistry ,Nanoparticle ,02 engineering and technology ,Physics, Atomic, Molecular & Chemical ,[SPI]Engineering Sciences [physics] ,General Materials Science ,Diffusion (business) ,Suspension (vehicle) ,ComputingMilieux_MISCELLANEOUS ,Chemistry, Physical ,Physics ,Temperature ,MICROSCOPY ,Oxides ,021001 nanoscience & nanotechnology ,DIFFUSION ,TIME ,FLUORESCENCE CORRELATION SPECTROSCOPY ,Chemistry ,Second Harmonic Generation Microscopy ,Physical Sciences ,Harmonic ,Science & Technology - Other Topics ,0210 nano-technology ,Two-dimensional nuclear magnetic resonance spectroscopy ,Digital image correlation ,Materials science ,Cells ,Materials Science ,Materials Science, Multidisciplinary ,SHG NANOPROBES ,ddc:500.2 ,AUTOCORRELATION ,03 medical and health sciences ,Humans ,Nanoscience & Nanotechnology ,Physical and Theoretical Chemistry ,Spectroscopy ,Science & Technology ,Harmonic generation ,Spectrum Analysis ,Correlation spectroscopy ,Water ,Photobleaching ,MODEL ,NANOCRYSTALS ,030104 developmental biology ,A549 Cells ,FLUCTUATION CORRELATION SPECTROSCOPY ,[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic ,Nanoparticles - Abstract
The absence of photobleaching, blinking, and saturation combined with a high contrast provides unique advantages of higher-harmonic generating nanoparticles over fluorescent probes, allowing for prolonged correlation spectroscopy studies. We apply the coherent intensity fluctuation model to study the mobility of second harmonic generating nanoparticles. A concise protocol is presented for quantifying the diffusion coefficient from a single spectroscopy measurement without the need for separate point-spread-function calibrations. The technique's applicability is illustrated on nominally 56 nm LiNbO3 nanoparticles. We perform label-free raster image correlation spectroscopy imaging in aqueous suspension and spatiotemporal image correlation spectroscopy in A549 human lung carcinoma cells. In good agreement with the expected theoretical result, the measured diffusion coefficient in water at room temperature is (7.5 +/- 0.3) mu m(2)/s. The diffusion coefficient in the cells is more than 10(3) times lower and heterogeneous, with an average of (3.7 +/- 1.5) X 10(-3) mu m(2)/s. This research was supported by the Research Foundation Flanders (Fonds Wetenschappelijk Onderzoek, project G092915FWO) and by the Interuniversity Attraction Poles Program (IAP FS2 P7/05, Functional Supramolecular Systems) initiated by the Belgian Science Policy Office. The authors are grateful to Prof. Dr. J. D'Haen for the SEM image, to Dr. N. Smisdom for fruitful discussions, and to Dr. R. Paesen and Dr. N. Smisdom for the design of the polarization unit. Research in P.P.'s laboratory was supported by the Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
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- 2018
5. Preparation and Preliminary Nonlinear Optical Properties of BiFeO 3 Nanocrystal Suspensions from a Simple, Chelating Agent-Free Precipitation Route
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Oisín Phelan, Christine Galez, Sandrine Beauquis, Mathias Urbain, Yannick Mugnier, Ronan Le Dantec, Virginie Monnier, Théo Tytus, Gnon Djanta, Gareth Clarke, Yann Chevolot, Jérémy Riporto, Laboratoire SYstèmes et Matériaux pour la MEcatronique (SYMME), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), INL - Chimie et Nanobiotechnologies (INL - C&N), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), and Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)
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Diffraction ,Materials science ,Article Subject ,Annealing (metallurgy) ,Scattering ,Nanoparticle ,02 engineering and technology ,[CHIM.MATE]Chemical Sciences/Material chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Amorphous solid ,law.invention ,Chemical engineering ,Nanocrystal ,Impurity ,law ,lcsh:Technology (General) ,lcsh:T1-995 ,General Materials Science ,Crystallization ,0210 nano-technology ,ComputingMilieux_MISCELLANEOUS - Abstract
Preparation of stable BiFeO3 nanocrystal suspensions through a simple, low-cost precipitation technique is described. Amorphous precursors are first precipitated from metal nitrate salts in highly basic KOH solutions, and a short high-temperature annealing step is then performed to induce crystallization. Nanoparticles are characterized by X-ray diffraction (XRD), TEM, DLS and ζ-potential measurements, and the synthesis conditions optimized after a systematic variation of the KOH concentration within the range of 1–12 M. The presence of residual impurities (mainly Bi25FeO39 and Bi2Fe4O9) quantified from XRD and mean nanocrystal size is found to be strongly influenced by the initial KOH solution content. A concentration at about 3–4 M is optimal in terms of BiFeO3 phase-purity and nanocrystal size. Stability of aqueous dispersions of the amorphous precursors and of the purest crystallized nanoparticles is also characterized between pH = 2 and pH = 13. After preparation of stable, almost phase-pure BiFeO3 nanocrystal suspensions, second and third harmonic scattering (SHS and THS) at excitation wavelengths of 1064 nm and 1250 nm are reported from nonlinear optical scattering measurements and compared with other recently published literature values.
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- 2018
6. Bismuth ferrite dielectric nanoparticles excited at telecom wavelengths as multicolor sources by second, third, and fourth harmonic generation
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Luigi Bonacina, Cédric Schmidt, Tadas Balciunas, Andrius Baltuška, Yannick Mugnier, Alexis Demierre, Gabriel Campargue, Ronan Le Dantec, Jean-Pierre Wolf, Jérémy Riporto, Vasyl Kilin, Mathias Urbain, Laboratoire SYstèmes et Matériaux pour la MEcatronique (SYMME), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), and Université de Genève (UNIGE)
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Materials science ,Physics::Optics ,FOS: Physical sciences ,02 engineering and technology ,Dielectric ,ddc:500.2 ,01 natural sciences ,chemistry.chemical_compound ,Fiber laser ,0103 physical sciences ,General Materials Science ,010306 general physics ,ComputingMilieux_MISCELLANEOUS ,Bismuth ferrite ,Harmonic generation ,business.industry ,021001 nanoscience & nanotechnology ,Polarization (waves) ,3. Good health ,Wavelength ,chemistry ,Excited state ,Harmonics ,[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic ,Dielectric nanoparticles ,0210 nano-technology ,Telecommunications ,business ,Excitation ,Physics - Optics ,Optics (physics.optics) - Abstract
We demonstrate the simultaneous generation of second, third, and fourth harmonic from a single dielectric Bismuth Ferrite nanoparticle excited by a telecom fiber laser at 1560 nm. We first characterize the signals associated with different nonlinear orders in terms of spectrum, excitation intensity dependence, and relative signal strengths. Successively, on the basis of the polarization-resolved emission curves of the three harmonics, we discuss the interplay of susceptibility tensor components at the different orders and we show how polarization can be used as an optical handle to control the relative frequency conversion properties., Comment: include S.I. section at the end of the main pdf file
- Published
- 2018
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