高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (07): 1517-1522.doi: 10.3969/j.issn.0251-0790.2012.07.028

• 物理化学 • 上一篇    下一篇

和频光谱研究油酸包覆的Fe3 O4 纳米颗粒

黄芝1,2, 郭源1   

  1. 1. 北京分子科学国家实验室, 分子反应动力学国家重点实验室, 中国科学院化学研究所, 北京 100190;
    2. 中国科学院研究生院, 北京 100049
  • 收稿日期:2011-12-26 出版日期:2012-07-10 发布日期:2012-07-10
  • 通讯作者: 郭 源, 男, 副研究员, 主要从事界面分子光谱和化学动力学研究. E-mail: guoyuan@iccas.ac.cn E-mail:guoyuan@iccas.ac.cn
  • 基金资助:

    国家自然科学基金(批准号: 21073199)和中国科学院知识创新工程重要方向项目水科学基础问题研究计划(批准号: KJCX-EW-W09)资助.

Sum Frequency Generation Vibrational Spectroscopy Study of Fe3O4 Nanoparticles Modified by Oleic Acid Molecules

HUANG Zhi1,2, GUO Yuan1   

  1. 1. Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry Chinese Academy of Sciences, Beijing 100190, China;
    2. Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
  • Received:2011-12-26 Online:2012-07-10 Published:2012-07-10

摘要: 采用红外-可见和频振动光谱研究了表面包覆油酸分子的Fe3O4纳米颗粒, 得到了2种实验构型(构型1: 可见光入射角63°, 红外光入射角55°; 构型2: 可见光入射角45°, 红外光入射角55°)和3种偏振组合(ssp, ppp, sps)下的和频振动光谱, 比较了2种实验构型下和频光谱的特征, 通过偏振分析方法对各个光谱峰进行了归属.

关键词: 和频振动光谱, 四氧化三铁, 纳米颗粒, 油酸

Abstract: The sum frequency generation vibrational spectroscopy(SFG-VS), an interface selective and chemical specific nonlinear optical technology, was used to study the Fe3O4 nanoparticles modified by oleic acid molecules. The SFG spectra of two different experimental configurations(configuration 1: the incident angle of visible laser beam is 63?; configuration 2: the incident angle of visible laser is 45?) and three polarization combinations(ssp, ppp and sps) were investigated. The coherent features of SFG spectra in different experimental configurations were analyzed and the vibrational modes of the spectral peaks were assigned according to the polarization selection rules.

Key words: Sum frequency generation vibrational spectroscopy(SFG-VS), Fe3O4, Nanopaticles, Oleic acid

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