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Journal of Nanomaterials
Volume 2011, Article ID 830157, 8 pages
http://dx.doi.org/10.1155/2011/830157
Research Article

Diameter- and Shape-Controlled ZnS/Si Nanocables and Si Nanotubes for SERS and Photocatalytic Applications

1Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
2Department of Physics and Materials Science, Center Of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Hong Kong
3Graduate School of Chinese Academy of Sciences, Beijing 100039, China

Received 21 December 2010; Accepted 26 April 2011

Academic Editor: Sherine Obare

Copyright © 2011 Xue Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

ZnS/Si nanocables were synthesized via a simple two-step thermal evaporation method. The shape and diameter of the ZnS/Si nanocables can be controlled by adjusting the morphologies of the ZnS nanostructures (nanowire or nanoribbon) obtained in the first step and the deposition time of the Si shell in the second step, respectively. Furthermore, we obtained polycrystalline Si nanotubes with different shapes and diameters by etching away the inner ZnS core. The as-prepared Si nanotubes were employed as SERS-active substrates, which exhibited a high sensitivity for the detection of R6G. The Si nanotubes also showed effective photocatalytic activity on the decomposition of R6G under the irradiation of visible light.