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INFLUENCE OF ADDING KCl ON LIGHT ABSORPTION SPECTRA OF SILVER COLLOID

WANG WEI-NING FANG YAN FU SHI-YOU ZHANG PENG-XIANG

INFLUENCE OF ADDING KCl ON LIGHT ABSORPTION SPECTRA OF SILVER COLLOID

WANG WEI-NING, FANG YAN, FU SHI-YOU, ZHANG PENG-XIANG
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  • Received Date:  14 March 1989
  • Published Online:  20 March 2005

INFLUENCE OF ADDING KCl ON LIGHT ABSORPTION SPECTRA OF SILVER COLLOID

  • 1. (1)北京师范学院物理系; (2)中国科学院物理研究所,北京,100080

Abstract: The influence of adding KCI to silver colloid on light absorption of the colloid was studied and compared with that of adding pyridine to the colloid. It was found that the light absorption was increased due to the formation of an atomic cluster layer on the Ag particle surfaces caused by adding KCI, and that the original surfaces plasmon resonance absorption was reduced. At the same time, the linear-chain aggregation caused by adding KCI lead to an apparent red shift of the plasmon resonance absorption, which sometimes was difficult to observe. The influence of these changes on SERS was also discussed.

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