Acta Chimica Sinica ›› 2005, Vol. 63 ›› Issue (17): 1561-1564. Previous Articles     Next Articles

Original Articles

银纳米粒子自组装结构的光谱性质研究

周群1,张兴霞1,庞芬只1,李晓伟2,郑军伟*1,陆天虹2   

  1. (1苏州大学化学化工学院 苏州 215006)
    (2中国科学院长春应用化学研究所 长春130022)
  • 收稿日期:2004-10-30 修回日期:2005-05-20 出版日期:2005-09-14 发布日期:2010-12-10
  • 通讯作者: 郑军伟

Spectroscopic Study of Self-assembly Structure of Silver Nanoparticles

ZHOU Qun1,ZHANG Xing-Xia1,PANG Fen-Zhi1,LI Xiao-Wei2
ZHENG Jun-Wei*1,LU Tian-Hong2   

  1. (1 Department of Chemistry, Suzhou University, Suzhou 215006)
    (2 Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022)
  • Received:2004-10-30 Revised:2005-05-20 Online:2005-09-14 Published:2010-12-10
  • Contact: ZHENG Jun-Wei

Two-dimensional submonolayer of silver nanoparticles was prepared on glass surface by self-assembly method. Double assembly structure of silver nanoparticles was also constructed with 4-aminothiophenol as the linker, forming particle cluster with molecular gap between the particles. Surface plasmon resonance (SPR) of the assembled silver nanoparticles depended on the distance between the particles, the adsorption of molecules, and the assembly structure. The electromagnetic coupling among the particles in the particle monolayer resulted in a blue shift of the SPR band. The adsorption of 4-aminothiolphenol, on the other hand, caused a red shift of the SPR band. Surface-enhanced Raman spectroscopic results demonstrated that the silver nanoparticle cluster with molecular gap between the particles led to a great enhancement of the Raman scattering of the linker 4-aminothiophenol molecules, and larger extent of charge transfer between the 4-aminothiophenol molecules and silver nanoparticles.

Key words: silver nanoparticle, 4-aminothiophenol, self-assembly, surface-enhanced Raman spectroscopy, surface plasmon resonance