Acta Phys. -Chim. Sin. ›› 2006, Vol. 22 ›› Issue (06): 756-760.doi: 10.3866/PKU.WHXB20060622

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The Effect of Anions on Silver Colloids Aggregation

ZHANG Ai-Ping;FANG Yan   

  1. Beijing Key Laboratory for Nanophotonics and Nanostructure, Capital Normal University, Beijing 100037, P. R. China
  • Received:2005-12-19 Revised:2006-01-20 Published:2006-05-31
  • Contact: ZHANG Ai-Ping

Abstract: The aggregation effect of yellow silver colloids caused by adding some anions has been investigated with UV-Vis absorption, transmission electron microscopy (TEM), and Raman spectra. It was found that colloidal aggregation and shape changing occurred when anions were added, in addition, an absorption peak at much longer wavelength and an exceptional Raman signals appeared. The experimental results indicated that the effects of various anions were different from each other, and the possible mechanism was discussed.

Key words: Silver colloids, Anion, UV-Vis absorption spectra, Raman spectra