Acta Phys. -Chim. Sin. ›› 2009, Vol. 25 ›› Issue (07): 1337-1341.doi: 10.3866/PKU.WHXB20090705

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Surface-Enhanced Raman Spectrum and Preparation of One-Dimensional Copper(Core)-Nickel(Shell) Nanostructure

MA Shan-Shan, ZHANG Ying-Jiu, HU Xiao-Yang, CHENG Liang, ZHOU Hui-Hua, TIAN Yong-Tao, LI Xin-Jian, ZHU Jing   

  1. Laboratory of Material Physics, Department of Physics, Zhengzhou University, Zhengzhou 450052, P. R. China|Beijing National Center for Electron Microscopy, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
  • Received:2008-12-25 Revised:2009-03-27 Published:2009-06-26
  • Contact: ZHANG Ying-Jiu E-mail:zhangyj2006@zzu.edu.cn

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Abstract:

A copper(core)-nickel(shell) nanostructure was synthesized by porous anodic aluminum oxide template (AAO) combined with electrochemical deposition according to a new two-step method, i.e., the copper nanowire core was prepared first and then the AAO pore was widened and followed by the growth of the nickel shell in the interspace between the wall of the pore and the copper nanowire. The structure and morphology were characterized and analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission election microscopy (TEM). The results verified that this method for the fabrication of the core-shell structure was effective. Adenine was used as a probe molecule to investigate the surface-enhanced Raman scattering (SERS) effect of this type of core-shell nanowire and the results revealed that the controllable one-dimensional core-shell nanomaterial is a potential SERS active substrate, which may exploit the use of transition metals for SERS.

Key words: Porous anodic aluminumoxide template, Electrochemical deposition, Pore widening, Core-shell nanostructure, Surface-enhanced Raman spectrum