Article
Determination of the Optical Constants of Gold Nanoparticles from Thin-Film Spectra
Author/s | Pecharroman, Carlos
Gaspera, Enrico Della Martucci, Alessandro Escobar-Galindo, Ramón Mulvaney, Paul |
Department | Universidad de Sevilla. Departamento de Física Aplicada I |
Publication Date | 2015-04-06 |
Deposit Date | 2023-06-14 |
Published in |
|
Abstract | We determine the optical properties of nanocomposites comprising gold nanoparticles embedded in a titania matrix using spectroscopic ellipsometry. We then apply the spectral representation formalism due to Bergman, to ... We determine the optical properties of nanocomposites comprising gold nanoparticles embedded in a titania matrix using spectroscopic ellipsometry. We then apply the spectral representation formalism due to Bergman, to extract the dielectric function of the individual gold nanoparticles (NPs). We show that analytical forms of the spectral representation function can be generated, which enable local clustering and the width of the surface plasmon resonance to be accounted for. The model also explains anomalously high, near-infrared absorption by small metal particles, reported by Tanner. The procedure provides a method to determine the optical constants of a wide range of metallic and semiconducting nanoparticles from ellipsometric data. |
Funding agencies | Ministerio de Economía y Competitividad (MINECO). España |
Project ID. | MAT2011-29174-C02-01 |
Citation | Pecharroman, C., Gaspera, E.D., Martucci, A., Escobar-Galindo, R. y Mulvaney, P. (2015). Determination of the Optical Constants of Gold Nanoparticles from Thin-Film Spectra. The Journal of Physical Chemistry C, 119 (17), 9450-9459. https://doi.org/10.1021/jp512611m. |
Files | Size | Format | View | Description |
---|---|---|---|---|
jp512611m.pdf | 1.034Mb | [PDF] | View/ | |