Quantitative Understanding of the Optical Properties of a Single, Complex-Shaped Gold Nanoparticle from Experiment and Theory
| Autor: | Frank Jäckel, Christina Scheu, Andreas Wisnet, Markus Döblinger, Jochen Feldmann, Eduardo Marcelo Perassi, Calin Hrelescu, Eduardo A. Coronado |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
General Physics and Astronomy Nanoparticle Near and far field Nanotechnology INGENIERÍAS Y TECNOLOGÍAS tomography Discrete dipole approximation Molecular physics symbols.namesake purl.org/becyt/ford/2.10 [https] Rayleigh General Materials Science Rayleigh scattering Spectroscopy enhancement Raman dark-field Nanotecnología Scattering nanoparticle General Engineering Nano-materiales purl.org/becyt/ford/2 [https] Electron tomography symbols DDA Raman spectroscopy |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| ISSN: | 1936-086X 1936-0851 |
| Popis: | We report on a combined study of Rayleigh and Raman scattering spectroscopy, 3D electron tomography, and discrete dipole approximation (DDA) calculations of a single, complex-shaped gold nanoparticle (NP). Using the exact reconstructed 3D morphology of the NP as input for the DDA calculations, the experimental results can be reproduced with unprecedented precision and detail. We find that not only the exact NP morphology but also the surroundings including the points of contact with the substrate are of crucial importance for a correct prediction of the NP optical properties. The achieved accuracy of the calculations allows determining how many of the adsorbed molecules have a major contribution to the Raman signal, a fact that has important implications for analyzing experiments and designing sensing applications. Fil: Perassi, Eduardo Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina Fil: Hrelescu, Calin. Ludwig Maximilians Universitat; Alemania Fil: Wisnet, Andreas. Ludwig Maximilians Universitat; Alemania Fil: Doblinger, Markus. Ludwig Maximilians Universitat; Alemania Fil: Scheu, Christina. Ludwig Maximilians Universitat; Alemania Fil: Jäckel, Frank. Ludwig Maximilians Universitat; Alemania Fil: Coronado, Eduardo A.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina Fil: Feldmann, Jochen. Ludwig Maximilians Universitat; Alemania |
| Databáze: | OpenAIRE |
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