物理化学学报 >> 2014, Vol. 30 >> Issue (4): 623-627.doi: 10.3866/PKU.WHXB201312273

热力学，动力学和结构化学 上一篇    下一篇

表面增强拉曼光谱研究自组装单分子层在化学接触和纳米隔绝下的分子振动活性变化

周杰1, 李柏霖2, 朱沛志3, 卢晓林1,2   

  1. 1 浙江理工大学化学系, 教育部先进纺织材料与制备技术重点实验室, 杭州310018;
    2 东南大学生物科学与医学工程学院, 生物电子学国家重点实验室, 南京210096;
    3 扬州大学化学化工学院, 江苏扬州225009
  • 收稿日期:2013-10-11 修回日期:2013-12-26 发布日期:2014-03-31
  • 通讯作者: 卢晓林 E-mail:kelxl@163.com
  • 基金资助:

    国家自然科学基金(51173169，21004054)，浙江省钱江人才计划(2011R10025)，教育部留学归国人员科研启动基金和浙江省留学人员科技活动项目择优资助项目. 卢晓林还受到江苏高校优势学科建设工程项目(1107037001)资助

Vibrational Activity Change of Self-Assembled Monolayers upon Chemical Attachment and Nanoscale Block Revealed by Surface Enhanced Raman Spectroscopy

ZHOU Jie1, LI Bo-Lin2, ZHU Pei-Zhi3, LU Xiao-Lin1,2   

  1. 1 Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Education Ministry, Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China;
    2 State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing 210096, P. R. China;
    3 College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225009, Jiangsu Province, P. R. China
  • Received:2013-10-11 Revised:2013-12-26 Published:2014-03-31
  • Contact: LU Xiao-Lin E-mail:kelxl@163.com
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (51173169, 21004054), Qianjiang Talents Project of Department of Science and Technology in Zhejiang Province, China (2011R10025), Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education, and Human Resources and Social Security Bureau of Zhejiang Province, China. LU X. L. was also supported by the Fund from the Priority Academic Program Development of Jiangsu Higher Education Institutions, China (PAPD 1107037001).

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摘要：

为确定表面增强拉曼光谱中某些有争议的弱振动模式是来自高阶的影响还是分子基团对称性变化的影响，本文以1，4-苯二硫醇作为探针分子提供了一种实验验证的框架方法. 光谱实验显示，观测到的有争议的弱振动模式并不是来自高阶的影响，而是分子基团对称性变化所致. 我们的实验框架方法很容易拓展开来，如用于研究其它波长激光激发的类似体系或有机分子搭接的分子结.

关键词: 表面增强拉曼光谱, 高阶影响, 对称性变化, 1,4-苯二硫醇, 银纳米颗粒

Abstract:

The origin of weak ambiguous vibrational modes in surface enhanced Raman scattering (SERS), i.e., from the high-order effect or symmetry change using 1,4-benzenedithiol (BDT) as a probe, is investigated. Weak ambiguous vibrational modes are caused by symmetry change rather than high-order effect. The experimental method can be extended, e.g., to similar systems excited by lasers with different wavelengths, or microelectronic junctions bridged by organic molecules.

Key words: Surface-enhanced raman scattering, High-order effect, Symmetry change, 1,4-Benzenedithiol, Silver nanoparticle