高等学校化学学报

高等学校化学学报

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AucoreCoshell纳米粒子的制备、表征及其表面增强拉曼光谱研究

鲍芳1, 崔颜2, 姚建林1, 任斌2, 顾仁敖1   

    1. 苏州大学化学系, 苏州 215123;
    2. 厦门大学固体表面物理化学国家重点实验室, 化学系, 厦门 361005
  • 收稿日期:2006-10-21 修回日期:1900-01-01 出版日期:2007-04-10 发布日期:2007-04-10
  • 通讯作者: 顾仁敖

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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摘要： 在乙醇体系中和在制备好的Au纳米粒子表面, 用水合肼还原钴盐制备Co壳, 首次通过化学还原法制得核壳结构的Au-Co纳米粒子, 并通过控制钴盐的投料, 得到不同包裹层厚度的AucoreCoshell纳米粒子. 用扫描电子显微镜(SEM)和电化学循环伏安法(CV)等测试方法对其进行表征, 并用吡啶(Py)作为探针分子研究了其SERS效应.

关键词: AucoreCoshell纳米粒子, 表面增强拉曼光谱, 循环伏安

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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