Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (4): 623-627.doi: 10.3866/PKU.WHXB201312273


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
  • 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).


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