Trapping of gold nanoparticles within arrays of topological defects: evolution of the LSPR anisotropy
| Autor: | Olivier Merchiers, Emmanuelle Lacaze, Delphine Coursault, Yves Borensztein |
|---|---|
| Přispěvatelé: | Physico-chimie et dynamique des surfaces (INSP-E6), Institut des Nanosciences de Paris (INSP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Centre d'Energétique et de Thermique de Lyon (CETHIL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-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), CETHIL, Laboratoire, Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Condensed matter physics Physics::Optics Nanoparticle Nanotechnology Topological defect Condensed Matter::Materials Science Liquid crystal [SPI.MECA.THER]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Thermics [physics.class-ph] Perpendicular General Earth and Planetary Sciences Dislocation Surface plasmon resonance General Agricultural and Biological Sciences Anisotropy ComputingMilieux_MISCELLANEOUS Plasmon [SPI.MECA.THER] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Thermics [physics.class-ph] General Environmental Science |
| Zdroj: | Rendiconti Lincei Rendiconti Lincei, 2015, 26, pp.183 HAL |
| ISSN: | 1720-0776 2037-4631 |
| DOI: | 10.1007/s12210-015-0438-x |
| Popis: | We demonstrate how the localized surface plasmon resonance (LSPR) of gold nanoparticles is affected by their trapping within topological defect cores. Using aligned arrays of smectic edge dislocations, we evidence a reversal of the LSPR anisotropy, when the nanoparticle concentration increases. We combine UV–visible spectroscopy with simulations to show that this reversal is related to a transformation of the nanoparticle organization. When the concentration increases, the organization varies from nanoparticle chains parallel to the dislocations to anisotropic nanoparticle ribbons, larger in the direction perpendicular to the dislocations, moreover denser perpendicular to the dislocation than parallel to the dislocations. This transformation may be associated with the localized presence of dense arrays of aligned dislocations, inducing a compression between the NPs, but only in the direction perpendicular to the dislocations. |
| Databáze: | OpenAIRE |
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