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Bruckschlegel C, Pasquier C, Toquer G, Girard L, Odorico M, Lautru J, Diat O, Bauduin P. Toward Distinguishing between the Superchaotropic and Hydrophobic Characters of Nanometric-Sized Ions in Interaction with PEGylated Surfaces. J Phys Chem Lett 2024; 15:4229-4236. [PMID: 38634114 DOI: 10.1021/acs.jpclett.4c00710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
In this study, we explore the superchaotropic effect of various polyoxometalate or boron cluster nano-ions on hydrophilic neutral surfaces. Nano-ions, characterized by low charge densities, exhibit strong adsorption on non-ionic hydrophilic surfaces like PEGylated micelles. This adsorption phenomenon was attributed to the enthalpically favorable dehydration of nano-ions, the so-called superchaotropic effect. Here, we investigate the adsorption of three nano-ions, α-SiW12O404-, α-PW12O403-, and B12I122-, with decreasing charge density or increasing superchaotropicity (or hydrophobicity), on hydrophilic solid surfaces, PEGylated gold nanoparticles, and PEGylated gold-coated quartz crystal. Solid surfaces are devoid of hydrophobic regions, enabling the study of the subtle nuance between hydrophobic and superchaotropic effects. Unlike adsorption on PEGylated micelles, the adsorption constant decreases with a reduced charge density, aligning with the well-established principle that hydrophobic ions do not adsorb on hydrophilic surfaces. This research improves our understanding of the subtle difference between superchaotropic and hydrophobic effects in nano-ion adsorption phenomena.
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Affiliation(s)
- Christoph Bruckschlegel
- Institute of Analytical Chemistry, Chemo- and Biosensors University of Regensburg, 93053 Regensburg, Germany
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, 30207 Bagnols sur Cèze Cedex, France
| | - Coralie Pasquier
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, 30207 Bagnols sur Cèze Cedex, France
| | - Guillaume Toquer
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, 30207 Bagnols sur Cèze Cedex, France
| | - Luc Girard
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, 30207 Bagnols sur Cèze Cedex, France
| | - Michael Odorico
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, 30207 Bagnols sur Cèze Cedex, France
| | - Joseph Lautru
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, 30207 Bagnols sur Cèze Cedex, France
| | - Olivier Diat
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, 30207 Bagnols sur Cèze Cedex, France
| | - Pierre Bauduin
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, 30207 Bagnols sur Cèze Cedex, France
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2
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Benarib S, Dacheux N, Le Goff XF, Lautru J, Di Mascio L, Clavier N. Hydrothermal conversion of mixed uranium(IV)-cerium(III) oxalates into U 1-xCe xO 2+δ· nH 2O solid solutions. Dalton Trans 2023. [PMID: 37490297 DOI: 10.1039/d3dt01510f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
Uranium-cerium oxide solid solutions, U1-xCexO2+δ·nH2O, were prepared through hydrothermal conversion of mixed U(IV)-Ce(III) oxalate precursors, cerium being used as a surrogate for plutonium. Whatever the starting pH, the fluorite-type structure of AnO2 was obtained after heating at 250 °C for 24 h. The initial pH of the reaction media appeared to affect significantly the oxide morphology: for pH ≤ 2, the powder was found to be composed of microspheres, whereas for more alkaline pH values, agglomerates of nanocrystallites were found. Furthermore, a study of the hydrothermal treatment duration (T = 250 °C, pH = 8, t = 1-48 h) showed that fluorite-type mixed dioxides started to form after only 1 h, and then became single phase after 3 h. SEM and TEM/EDS analyses revealed that the cationic distribution narrowed with time to finally form highly homogeneous mixed oxides. Such a preparation route was then applied to various cerium incorporation rates and it was found that the formation of U1-xCexO2+δ·nH2O mixed oxides was possible for 0.1 ≤ x ≤ 0.75. In all the systems investigated, the speciation of uranium and cerium was questioned in both the solid and liquid phases. Thermodynamic calculations and evaluation of the O/M ratio in the final oxides led us to understand the complex redox behaviour of uranium and cerium in solution during hydrothermal processes and to propose a conversion mechanism.
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Affiliation(s)
- S Benarib
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France.
| | - N Dacheux
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France.
| | - X F Le Goff
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France.
| | - J Lautru
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France.
| | - L Di Mascio
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France.
| | - N Clavier
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France.
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Lu Z, Zemb T, Le Goff X, Clavier N, Khoder H, Lautru J, Rébiscoul D. Facile Preparation of Macro-Microporous Thorium Oxide via a Colloidal Sol-Gel Route toward Safe MOX Fuel Fabrication. ACS Appl Mater Interfaces 2022; 14:53165-53173. [PMID: 36383750 DOI: 10.1021/acsami.2c16384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The identification of new colloidal sol-gel routes for the preparation of actinide oxides, which have a homogeneous and accessible porosity that can easily be impregnated by any concentrated actinide solution, opens new perspectives for the preparation of homogeneous nuclear fuel for minor actinide transmutation. This homogeneity allows us to avoid "hot spot" formation due to the local accumulation of more fissile elements. Here, we report the preparation of macro-microporous ThO2 materials by a colloidal sol-gel route. Using a thorium salt with 6-aminocaproic acid as a complexing agent at a controlled pH, we were able to pilot the condensation of thorium hydroxo species forming colloids of tuned nanometric size and thus the sol stability. After a freeze-drying process to concentrate colloids and a thermal treatment allowing complexing agent removal and macroporosity formation by a brutal gas release during combustion, a loose packing of ThO2 nanoparticles with an ordered distribution of interparticular porosity and a fraction of nanometric crystallites, whose size depends on the initial colloidal size, were obtained. The sols, pastes, and final materials were characterized by small- and wide-angle X-ray scattering to determine the colloidal size and the final structure of the materials, which was also confirmed by transmission electron microscopy. The most promising material was finally successfully impregnated by a simulating minor actinide solution and thermally treated to prepare a mixed actinide oxide material. This safe technology, relying on the colloidal sol-gel process and the formulation of complex fluids forming tunable precursors, opens new perspectives for the reuse of nuclear waste solutions as new fuel.
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Affiliation(s)
- Zijie Lu
- Institut de Chimie Séparative de Marcoule, CEA, UMR 5257 CEA-CNRS-UM-ENSCM, 30207 Bagnols-sur-Cèze, France
| | - Thomas Zemb
- Institut de Chimie Séparative de Marcoule, CEA, UMR 5257 CEA-CNRS-UM-ENSCM, 30207 Bagnols-sur-Cèze, France
| | - Xavier Le Goff
- Institut de Chimie Séparative de Marcoule, CEA, UMR 5257 CEA-CNRS-UM-ENSCM, 30207 Bagnols-sur-Cèze, France
| | - Nicolas Clavier
- Institut de Chimie Séparative de Marcoule, CEA, UMR 5257 CEA-CNRS-UM-ENSCM, 30207 Bagnols-sur-Cèze, France
| | - Hassan Khoder
- Institut de Chimie Séparative de Marcoule, CEA, UMR 5257 CEA-CNRS-UM-ENSCM, 30207 Bagnols-sur-Cèze, France
| | - Joseph Lautru
- Institut de Chimie Séparative de Marcoule, CEA, UMR 5257 CEA-CNRS-UM-ENSCM, 30207 Bagnols-sur-Cèze, France
| | - Diane Rébiscoul
- Institut de Chimie Séparative de Marcoule, CEA, UMR 5257 CEA-CNRS-UM-ENSCM, 30207 Bagnols-sur-Cèze, France
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Podor R, Mendonça J, Lautru J, Brau HP, Nogues D, Candeias A, Horodysky P, Kolouch A, Barreau M, Carrier X, Ramenatte N, Mathieu S, Vilasi M. Evaluation and application of a new scintillator-based heat-resistant back-scattered electron detector during heat treatment in the scanning electron microscope. J Microsc 2020; 282:45-59. [PMID: 33216353 DOI: 10.1111/jmi.12979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 09/16/2020] [Accepted: 11/10/2020] [Indexed: 11/28/2022]
Abstract
A new high-temperature detector dedicated to the collection of backscattered electrons is used in combination with heating stages up to 1050°C, in high-vacuum and low-vacuum modes in order to evaluate its possibilities through signal-to-noise ration measurements and different applications. Four examples of material transformations occurring at high temperature are herein reported: grain growth during annealing of a rolled platinum foil, recrystallisation of a multiphased alloy, oxidation of a Ni-based alloy and complex phase transformations occurring during the annealing of an Al-Si coated boron steel. The detector could be potentially adapted to any type of SEM and it offers good opportunities to perform high-temperature experiments in various atmospheres.
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Affiliation(s)
- R Podor
- ICSM, Univ Montpellier, CNRS, ENSCM, CEA, Bagnols sur Cèze, France
| | - J Mendonça
- ICSM, Univ Montpellier, CNRS, ENSCM, CEA, Bagnols sur Cèze, France.,NewTEC Scientific, Nîmes, France
| | - J Lautru
- ICSM, Univ Montpellier, CNRS, ENSCM, CEA, Bagnols sur Cèze, France
| | - H P Brau
- ICSM, Univ Montpellier, CNRS, ENSCM, CEA, Bagnols sur Cèze, France
| | - D Nogues
- NewTEC Scientific, Nîmes, France
| | | | | | - A Kolouch
- CRYTUR, spol. s.r.o., Czech Republic
| | - M Barreau
- Laboratoire de Réactivité de Surface, CNRS, Sorbonne Université, Paris, France
| | - X Carrier
- Laboratoire de Réactivité de Surface, CNRS, Sorbonne Université, Paris, France
| | - N Ramenatte
- CNRS, IJL, Université de Lorraine, Nancy, France
| | - S Mathieu
- CNRS, IJL, Université de Lorraine, Nancy, France
| | - M Vilasi
- CNRS, IJL, Université de Lorraine, Nancy, France
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Lu Z, Lautru J, Zemb T, Rébiscoul D. Colloidal sol of UO2 nanoparticles supported by multi-lamellar vesicles of carboxylate based surfactant. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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6
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Szenknect S, Mesbah A, Descostes M, Maihatchi-Ahamed A, Bonato L, Massonnet M, Ziouane Y, Vors E, Vercouter T, Clavier N, Lautru J, Dacheux N. Uranium removal from mining water using Cu substituted hydroxyapatite. J Hazard Mater 2020; 392:122501. [PMID: 32208317 DOI: 10.1016/j.jhazmat.2020.122501] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 02/25/2020] [Accepted: 03/08/2020] [Indexed: 06/10/2023]
Abstract
In this study, synthetic copper substituted hydroxyapatite (Cu-Hap), CuxCa10-x(PO4)6(OH)2 were prepared by co-precipitation method and were used as reactive materials in batch experiments to immobilize uranyl. The limit of incorporation of Cu into a single-phased Cu-Hap reached xCu ≤1.59. The synthetic Cu-Hap samples obtained with various Cu contents were contacted with synthetic uranyl doped solutions and with real mining waters showing various pH and chemical compositions. A fast and strong decrease of the uranium concentration was observed, followed by the establishment of an equilibrium after 1-4 days of contact with the solutions. Examination of the solid phase after uranium uptake was performed using a combination of techniques. Depending on the composition of the solution and the copper content of the Cu-Hap, various mechanisms of uranium removal were observed. Based on the experimental results and geochemical simulations, it appeared that the main interest for using Cu-Hap is to enlarge the domain of water compositions for which the precipitation of meta-torbernite, (H3O)0.4Cu0.8(UO2)2(PO4)2·7.6 H2O is the predominant mechanism associated to the uranium removal, especially for pH > 6.7 where carbonate uranium species are predominant.
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Affiliation(s)
| | - Adel Mesbah
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Bagnols/Cèze, France
| | - Michael Descostes
- ORANO Mines, R&D Dpt., 125 Avenue de Paris, 92330, Châtillon, France
| | | | - Laura Bonato
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Bagnols/Cèze, France
| | | | - Yannis Ziouane
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Bagnols/Cèze, France
| | - Evelyne Vors
- Den - Service d'Etudes Analytiques et de Réactivité des Surfaces (SEARS), CEA, Université Paris-Saclay, F-91191, Gif sur Yvette, France
| | - Thomas Vercouter
- Den - Service d'Etudes Analytiques et de Réactivité des Surfaces (SEARS), CEA, Université Paris-Saclay, F-91191, Gif sur Yvette, France
| | - Nicolas Clavier
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Bagnols/Cèze, France
| | - Joseph Lautru
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Bagnols/Cèze, France
| | - Nicolas Dacheux
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Bagnols/Cèze, France
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7
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Podor R, Le Goff X, Lautru J, Brau HP, Barreau M, Carrier X, Mendonça J, Nogues D, Candeias A. Direct Observation of the Surface Topography at High Temperature with SEM. Microsc Microanal 2020; 26:397-402. [PMID: 32241326 DOI: 10.1017/s1431927620001348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
High-temperature scanning electron microscopy allows the direct study of the temperature behavior of materials. Using a newly developed heating stage, tilted images series were recorded at high temperature and 3D images of the sample surface were reconstructed. By combining 3D images recorded at different temperatures, the variations of material roughness can be accurately described and associated with local changes in the topography of the sample surface.
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Affiliation(s)
- Renaud Podor
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France
| | - Xavier Le Goff
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France
| | - Joseph Lautru
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France
| | | | - Mathias Barreau
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, F-75252Paris, France
| | - Xavier Carrier
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, F-75252Paris, France
| | - Jerôme Mendonça
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France
- NewTEC Scientific, 285 Rue Gilles Roberval, 30900 Nîmes, France
| | - Dorian Nogues
- NewTEC Scientific, 285 Rue Gilles Roberval, 30900 Nîmes, France
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Qin D, Mesbah A, Lautru J, Szenknect S, Dacheux N, Clavier N. Reaction sintering of rhabdophane into monazite-cheralite Nd1-2xThxCaxPO4 (x = 0 – 0.1) ceramics. Ann Ital Chir 2020. [DOI: 10.1016/j.jeurceramsoc.2019.10.050] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Shehayeb S, Deschanels X, Lautru J, Ghannam L, Odorico M, Karamé I, Toquer G. Thin polymeric CuO film from EPD designed for low temperature photothermal absorbers. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.03.078] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Trinh DT, Mayer L, Hajj B, Lautru J, Zyss J, Shynkar V. Full determination of single ferroelectric nanocrystal orientation by Pockels electro-optic microscopy. Appl Opt 2015; 54:3412-3421. [PMID: 25967332 DOI: 10.1364/ao.54.003412] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We present a nanoscale electro-optic imaging method allowing access to the phase response, which is not amenable to classical second-harmonic generation microscopy. This approach is used to infer the vectorial orientation of single domain ferroelectric nanocrystals, based on polarization-resolved Pockels microscopy. The electro-optic phase response of KTP nanoparticles yields the full orientation in the laboratory frame of randomly dispersed single nanoparticles, together with their electric polarization dipole. The complete vector determination of the dipole orientation is a prerequisite to important applications including ferroelectric nanodomain orientation, membrane potential imaging, and rotational dynamics of single biomolecules.
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Chen VW, Sobeshchuk N, Lafargue C, Mansfield ES, Yom J, Johnstone LR, Hales JM, Bittner S, Charpignon S, Ulbricht D, Lautru J, Denisyuk I, Zyss J, Perry JW, Lebental M. Three-dimensional organic microlasers with low lasing thresholds fabricated by multiphoton and UV lithography. Opt Express 2014; 22:12316-12326. [PMID: 24921350 DOI: 10.1364/oe.22.012316] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Cuboid-shaped organic microcavities containing a pyrromethene laser dye and supported upon a photonic crystal have been investigated as an approach to reducing the lasing threshold of the cavities. Multiphoton lithography facilitated fabrication of the cuboid cavities directly on the substrate or on the decoupling structure, while similar structures were fabricated on the substrate by UV lithography for comparison. Significant reduction of the lasing threshold by a factor of ~30 has been observed for cavities supported by the photonic crystal relative to those fabricated on the substrate. The lasing mode spectra of the cuboid microresonators provide strong evidence showing that the lasing modes are localized in the horizontal plane, with the shape of an inscribed diamond.
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Nogues C, Leh H, Lautru J, Delelis O, Buckle M. Efficient antifouling surface for quantitative surface plasmon resonance based biosensor analysis. PLoS One 2012; 7:e44287. [PMID: 22984487 PMCID: PMC3440434 DOI: 10.1371/journal.pone.0044287] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Accepted: 08/01/2012] [Indexed: 11/19/2022] Open
Abstract
Non-specific binding to biosensor surfaces is a major obstacle to quantitative analysis of selective retention of analytes at immobilized target molecules. Although a range of chemical antifouling monolayers has been developed to address this problem, many macromolecular interactions still remain refractive to analysis due to the prevalent high degree of non-specific binding. In this manuscript we explore the dynamic process of the formation of self-assembled monolayers and optimize physical and chemical properties thus reducing considerably non-specific binding while maintaining the integrity of the immobilized biomolecules. As a result, analysis of specific binding of analytes to immobilized target molecules is significantly facilitated.
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Affiliation(s)
| | - Hervé Leh
- LBPA, ENS de Cachan, CNRS, Cachan, France
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Hajj B, Perruchas S, Lautru J, Dantelle G, Gacoin T, Zyss J, Chauvat D. Electro-optical Pockels scattering from a single nanocrystal. Opt Express 2011; 19:9000-9007. [PMID: 21643153 DOI: 10.1364/oe.19.009000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The electro-optical Pockels response from a single non-centrosymmetric nanocrystal is reported. High sensitivity to the weak electric-field dependent nonlinear scattering is achieved through a dedicated imaging interferometric microscope and the linear dependence of electro-optical signal upon the applied field is checked. Using different incident light polarization states, a priori random spatial orientation of the crystal can be inferred. The electro-optical response from a nanocrystal provides local subwavelength sensor of quasi-static electric fields with potential applications in physics and biology. It also leads to a new sub-wavelength microscopy towards the nanoscale investigation of interesting phenomena such as nanoferroelectricity.
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Affiliation(s)
- Bassam Hajj
- Laboratoire de photonique quantique et moléculaire, D’Alembert Institute, Ecole Normale Supérieure de Cachan, 61 Avenue du Président Wilson, 94230 Cachan, France.
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Kislyuk VV, Dimitriev OP, Pud AA, Lautru J, Ledoux-Rak I. In-situ conductivity and UV-VIS absorption monitoring of iodine doping-dedoping processes in poly(3-hexylthiophene) (P3HT). ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/286/1/012009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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