### 阴离子吸附对Ag溶胶光学性质和表面增强拉曼散射的影响

1. 中国科学院感光化学研究所
• 出版日期:1994-06-15 发布日期:1994-06-15

### The influence of anion adsorption on the optical property and SERS of Ag Sol

ZANG LING;LIU CHUNYAN;REN XINMIN

• Online:1994-06-15 Published:1994-06-15

The optical property and SERS of Ag sol adsorbed with different anions(CO32-, OH-, I-, Br-, Cl-) have been studied. It was found that the anions with higher nucleophilicity have stronger adsorption on the Ag particles accompanied by that a new absorption peak of Ag sol appeared at longer wavelength, which was caused by the reduction of the free electron d. in the surface layer of the Ag particles. The origin of SERS is attributed to the chemisorption of the anions on the Ag particles. Its intensity increases with increasing surface coverage of adsorption on the Ag particles.