中国物理B ›› 1997, Vol. 6 ›› Issue (3): 183-188.doi: 10.1088/1004-423X/6/3/003

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

SURFACE-ENHANCED RAMAN SCATTERING STUDY ON NON-ACTIVITY OF Ag-Cl CLUSTERS

方炎, 李勤   

  1. Experimental Centre, Capital Normal University, Beijing 100037, China
  • 收稿日期:1996-06-07 出版日期:1997-03-20 发布日期:1997-03-20

SURFACE-ENHANCED RAMAN SCATTERING STUDY ON NON-ACTIVITY OF Ag-Cl CLUSTERS

FANG YAN (方炎), LI QIN (李勤)   

  1. Experimental Centre, Capital Normal University, Beijing 100037, China
  • Received:1996-06-07 Online:1997-03-20 Published:1997-03-20

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摘要： The non-active mechanism of Ag-Cl clusters in surface-enhanced Raman scattering (SERS) was discussed on the basis of the study of the interaction and adsorption competition of chlorions with a series of compounds: benzoic acid, p-hydroxybenzoic acid, and m-hydroxybenzoic acid on silver surface. As a result of the addition of chlorions, the SERS signals of these molecules were sharply and rapidly reduced and quenched in intensity. The change of Raman bands at 1644 cm-1 for benzoic acid, and at 1636 cm-1 for p-hydroxybenzoic acid and m-hydroxybenzoic acid, before and after the addition of chlorions, indicated the desorption process of these adsorbed molecules, and the adsorption behavior of the molecules remaining adsorbed on the silver surface.

Abstract: The non-active mechanism of Ag-Cl clusters in surface-enhanced Raman scattering (SERS) was discussed on the basis of the study of the interaction and adsorption competition of chlorions with a series of compounds: benzoic acid, p-hydroxybenzoic acid, and m-hydroxybenzoic acid on silver surface. As a result of the addition of chlorions, the SERS signals of these molecules were sharply and rapidly reduced and quenched in intensity. The change of Raman bands at 1644 cm-1 for benzoic acid, and at 1636 cm-1 for p-hydroxybenzoic acid and m-hydroxybenzoic acid, before and after the addition of chlorions, indicated the desorption process of these adsorbed molecules, and the adsorption behavior of the molecules remaining adsorbed on the silver surface.

中图分类号:  (Other nonmetallic inorganics)

  • 78.30.Hv
68.43.Mn (Adsorption kinetics ?) 68.47.De (Metallic surfaces) 68.49.-h (Surface characterization by particle-surface scattering) 33.20.Fb (Raman and Rayleigh spectra (including optical scattering) ?) 36.40.-c (Atomic and molecular clusters)