期刊
JOURNAL OF RAMAN SPECTROSCOPY
卷 41, 期 9, 页码 907-913出版社
WILEY
DOI: 10.1002/jrs.2539
关键词
zinc oxide nanorods; silver; site-specific deposition; surface-enhanced Raman scattering
类别
资金
- National Natural Science Foundation of PR China [20573041, 20773044, 20873050]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT0422]
- Program for New Century Excellent Talents in University
- 111 project [B06009]
- Development Program of the Science and Technology of Jilin Province [20060902-02, 20075020]
- Key Projects in the National Science and Technology Pillar Program [2007BA138B03]
A controllable heterostructure consisting of ZnO nanorod arrays with attached Ag nanoparticles at only one end has been synthesized via a facile and convenient galvanic reduction method. Scanning electron microscopic images of these nanostructures showed good selectivity of Ag deposition on the tip of ZnO nanorod arrays. The formation of these regular Ag-ZnO heterogeneous nanorod arrays can be explained by a localization of the electrons at the ends of the ZnO nanorods after the electron transfer step. By tuning the reaction time and the concentration of silver nitrate, the density of Ag nanoparticles on the tip of ZnO nanorods can be well controlled. Owing to the introduction of Ag nanoparticles with different densities, the resulting Ag-ZnO heterogeneous nanorod arrays have been proved to be a versatile substrate for surface-enhanced Raman scattering not only for common organic molecules but also for label-free protein detection. Copyright (C) 2009 John Wiley & Sons, Ltd.
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