Open AccessSURFACE ENHANCED RAMAN SCATTERING FROM BENZOIC ACID, SALICYLIC ACID AND P-HYDROXYBENZOIC ACID IN Ag COLLOIDS
Author(s) -
Pengxiang Zhang,
Xiaoguang Gao,
Zhuang Weiping
Publication year - 1985
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.34.1603
Subject(s) - salicylic acid , benzoic acid , materials science , raman scattering , hydroxybenzoic acid , raman spectroscopy , colloid , molecule , analytical chemistry (journal) , optics , chemistry , organic chemistry , physics , biochemistry
We studied surface enhanced Raman scattering (SERS) from Benzoic Acid (BA), Salicylic Acid (SA) and P-Hydroxybenzoic Acid (PHBA) in silver sols. The enhanced Raman spectra are recorded and analyzed. The three molecules all contain vibration of ν(C-CO2-) and two of them (SA and PHBA) contain vibration of ν(C-OH), but located at different position. Making use of this situation, we analyzed the dependance of enhancement factor on the distance and orientation of the vibration dipoles relative to the surface and also compared with the pure electromagnetic model for SERS. An apparent discrepancy were revealed. The possible origins are disscussed. We also discussed the influence of coagulation of silver particles on the enhancement factors and pointed out the way for optimizing the enhancement in silver colloid.