1. Gold-seeded Lithium Niobate Nanoparticles: Influence of Gold Surface Coverage on Second Harmonic Properties
- Author
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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)
- Subjects
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
- Published
- 2021