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Chem. J. Chinese Universities

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Preparation and Characterization of AucoreCoshell Nanoparticles and Their Surface-enhanced Raman Spectroscopy

BAO Fang1, CUI Yan2, YAO Jian-Lin1, REN Bin2, GU Ren-Ao1*   

    1. Department of Chemistry, Suzhou University, Suzhou 215123, China;
    2. State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, Xiamen University, Xiamen 361005, China
  • Received:2006-10-21 Revised:1900-01-01 Online:2007-04-10 Published:2007-04-10
  • Contact: GU Ren-Ao

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Abstract: AucoreCoshell nanoparticles with different shell thicknesses were prepared by using chemical reduction method and characterized by scanning electron microscopy(SEM) and cyclic voltammetry(CV). The results reveal that the prepared core-shell nanoparticles were covered by Co shell and exhibited the similar electrochemistry property with the Co nanoparticles surface. Surface enhanced Raman spectroscopy(SERS) activities of these nanoparticles were studied by using pyridine as a probe molecule. It was found that the SERS intensity depended on the Co shell thickness of the core-shell nanoparticles and was weakened with the increasing shell thickness. The SERS intensity of these AucoreCoshell nanoparticles is found to be about twenty times higher than that obtained on an electrochemically roughened cobalt electrode.

Key words: AucoreCoshell nanoparticles, Surface enhanced Raman spectroscopy(SERS), Cyclic voltammetry(CV)

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