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Materials (Basel). 2011 Apr 14;4(4):791-800. doi: 10.3390/ma4040791.

Gold Nanostructures for Surface-Enhanced Raman Spectroscopy, Prepared by Electrodeposition in Porous Silicon.

Author information

1
Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan. k-fukami@iae.kyoto-u.ac.jp.
2
Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan. l-chourou@iae.kyoto-u.ac.jp.
3
Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan. r-miyagawa@iae.kyoto-u.ac.jp.
4
Department of Applied Physics, University Autonoma de Madrid, Carretera Colmenar Viejo, KM 15,500, 28049 Madrid, Spain. alvaro.munnoz@uam.es.
5
Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan. t-sakka@iae.kyoto-u.ac.jp.
6
Department of Applied Physics, University Autonoma de Madrid, Carretera Colmenar Viejo, KM 15,500, 28049 Madrid, Spain. miguel.manso@uam.es.
7
Department of Applied Physics, University Autonoma de Madrid, Carretera Colmenar Viejo, KM 15,500, 28049 Madrid, Spain. rauljose.martin@uam.es.
8
Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan. y-ogata@iae.kyoto-u.ac.jp.

Abstract

Electrodeposition of gold into porous silicon was investigated. In the present study, porous silicon with ~100 nm in pore diameter, so-called medium-sized pores, was used as template electrode for gold electrodeposition. The growth behavior of gold deposits was studied by scanning electron microscope observation of the gold deposited porous silicon. Gold nanorod arrays with different rod lengths were prepared, and their surface-enhanced Raman scattering properties were investigated. We found that the absorption peak due to the surface plasmon resonance can be tuned by changing the length of the nanorods. The optimum length of the gold nanorods was ~600 nm for surface-enhanced Raman spectroscopy using a He-Ne laser. The reason why the optimum length of the gold nanorods was 600 nm was discussed by considering the relationship between the absorption peak of surface plasmon resonance and the wavelength of the incident laser for Raman scattering.

KEYWORDS:

Raman spectroscopy; electrodeposition; gold; porous silicon

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