Open AccessINFLUENCE OF ADDING KCl ON LIGHT ABSORPTION SPECTRA OF SILVER COLLOID
Author(s) -
Weining Wu,
Yan Fang,
Fu Shi-You,
Pengxiang Zhang
Publication year - 1990
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.39.177
Subject(s) - colloid , absorption (acoustics) , surface plasmon resonance , gold colloid , materials science , absorption spectroscopy , plasmon , resonance (particle physics) , spectral line , analytical chemistry (journal) , photochemistry , optics , chemistry , nanoparticle , nanotechnology , optoelectronics , atomic physics , colloidal gold , chromatography , physics , composite material , astronomy
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.