Localized surface plasmon resonance of Au/TiO2(110): substrate and size influence from in situ optical and structural investigation
| Autor: | Alessandro Coati, M.C. Saint-Lager, Antoine Abisset, Stéphanie Garaudée, M. De Santis, Yvonne Soldo-Olivier, Aude Bailly, Yves Garreau, J. Lacipiere |
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| Přispěvatelé: | Surfaces, Interfaces et Nanostructures (NEEL - SIN), Institut Néel (NEEL), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Epitaxie et couches minces (NEEL- EpiCM), Service Etudes et Réalisation d'Appareillages Scientifiques (NEEL - SERAS), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Laboratoire pour l'utilisation du rayonnement électromagnétique (LURE), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-MENRT-Centre National de la Recherche Scientifique (CNRS), Surfaces, Interfaces et Nanostructures (SIN), Epitaxie et couches minces (EpiCM), SERAS (SERAS), Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Nanoparticle Bioengineering 02 engineering and technology Substrate (electronics) 010402 general chemistry 01 natural sciences General Materials Science Surface plasmon resonance Plasmon ComputingMilieux_MISCELLANEOUS [PHYS]Physics [physics] business.industry General Engineering General Chemistry [CHIM.CATA]Chemical Sciences/Catalysis 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences Blueshift Colloidal gold Optoelectronics Grazing-incidence small-angle scattering [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph] 0210 nano-technology business Visible spectrum |
| Zdroj: | Nanoscale Advances Nanoscale Advances, 2020, 2 (6), pp.2448-2461. ⟨10.1039/D0NA00165A⟩ Nanoscale Advances, RSC, 2020, 2 (6), pp.2448-2461. ⟨10.1039/D0NA00165A⟩ |
| ISSN: | 2516-0230 |
| DOI: | 10.1039/D0NA00165A⟩ |
| Popis: | International audience; Localized Surface Plasmon Resonance (LSPR) of noble metal nanoparticles has attracted a lot of attention in recent years as enhancer of the photocatalytic activity in the visible light domain. Rare are the experimental in situ studies, coupling structural and optical responses, but they are mandatory for a deep understanding of the mechanisms underlying LSPR. Herein we present an in situ investigation during the growth of gold nanoparticles (NPs) on TiO 2 (110) in the 2-6 nm size range. We probed the structural and morphological properties of the supported nanoparticles by performing GIXRD and GISAXS simultaneously with their optical response in p and s polarizations recorded by SDRS. The rutile surface state turns out to have a major effect on the Au NPs growth and on their plasmonic response, both in frequency and vibration modes. The roughening of the TiO 2 (110) surface weakens the interaction strength between the NPs and the substrate, favoring the growth of textured in-plane randomly orientated NPs. Compared to the epitaxial clusters growing on the flat TiO 2 surface, these textured NPs are characterized by a LSPR blue shift and by the presence of LSPR vibration modes perpendicular to the surface for sizes smaller than about 4 nm. |
| Databáze: | OpenAIRE |
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