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Optical properties of nanostructured metal films

Optical properties of nanostructured metal films
Optical properties of nanostructured metal films
Nanostructured metal films of platinum, gold and silver up to 675 nm thick we prepared by electrochemical deposition through templates of 700 nm diameter polystyrene spheres assembled as hexagonal close packed monolayer on an evaporated gold surface followed by removal of the template by dissolution in tetrahydrofuran. The reflection spectra of the films at normal incidence were recorded as a function of film thickness and the spectra correlated with the local visual appearance of the film and the surface structure from SEM. For thin films, below one quarter sphere height, the spectra show a single reflectivity dip at a wavelength just below the sphere diameter consistent with surface-plasmon grating-like behaviour. For the thicker films several reflectivity dips are observed which move towards longer wavelength with increasing film thickness. This behaviour is shown to be consistent with a model in which light reflected from the top of the structure interferes with light reflected from within the spherical segment cavities in the film.
grown photonic crystals, electrochemical deposition, colloidal crystals, macroporous structures, 2-dimensional arrays, fine particles, porous silica, templates, spheres, gold
0301-7249
117-132
Bartlett, P.N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Baumberg, J.J.
78e1ea7e-8c70-404c-bf84-59aafe75cd07
Coyle, S.
fea55080-7d4c-4df2-a0fa-ef0012cf36ee
Abdelsalam, M.E.
94ec836b-cf24-4b21-9a6c-c3436b8ef3b2
Bartlett, P.N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Baumberg, J.J.
78e1ea7e-8c70-404c-bf84-59aafe75cd07
Coyle, S.
fea55080-7d4c-4df2-a0fa-ef0012cf36ee
Abdelsalam, M.E.
94ec836b-cf24-4b21-9a6c-c3436b8ef3b2

Bartlett, P.N., Baumberg, J.J., Coyle, S. and Abdelsalam, M.E. (2003) Optical properties of nanostructured metal films. Faraday Discussions, 125, 117-132. (doi:10.1039/b304116f).

Record type: Article

Abstract

Nanostructured metal films of platinum, gold and silver up to 675 nm thick we prepared by electrochemical deposition through templates of 700 nm diameter polystyrene spheres assembled as hexagonal close packed monolayer on an evaporated gold surface followed by removal of the template by dissolution in tetrahydrofuran. The reflection spectra of the films at normal incidence were recorded as a function of film thickness and the spectra correlated with the local visual appearance of the film and the surface structure from SEM. For thin films, below one quarter sphere height, the spectra show a single reflectivity dip at a wavelength just below the sphere diameter consistent with surface-plasmon grating-like behaviour. For the thicker films several reflectivity dips are observed which move towards longer wavelength with increasing film thickness. This behaviour is shown to be consistent with a model in which light reflected from the top of the structure interferes with light reflected from within the spherical segment cavities in the film.

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Published date: 2003
Keywords: grown photonic crystals, electrochemical deposition, colloidal crystals, macroporous structures, 2-dimensional arrays, fine particles, porous silica, templates, spheres, gold
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 259962
URI: http://eprints.soton.ac.uk/id/eprint/259962
ISSN: 0301-7249
PURE UUID: de8f582d-397a-4b9f-b970-f855ea804c64
ORCID for P.N. Bartlett: ORCID iD orcid.org/0000-0002-7300-6900

Catalogue record

Date deposited: 21 Oct 2004
Last modified: 27 Apr 2022 01:35

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Contributors

Author: P.N. Bartlett ORCID iD
Author: J.J. Baumberg
Author: S. Coyle
Author: M.E. Abdelsalam

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