利用表面增强喇曼散射研究银表面上结晶紫分子的吸附  

Study of the adsorption of CV on the silver surfaces by Surface-enhanced Raman Scattering

作　　者：傅石友[1] 王明吉[1] 王云山[1] 刘业厚[1] 张鹏翔[1] 张志三 

机构地区：[1]大庆石油学院基础课部,中国科学院物理研究所

出　　处：《Chinese Journal of Chemical Physics》1994年第4期336-341,共6页化学物理学报（英文）

摘　　要：以表面增强喇曼散射力测量手段，详细讨论结晶紫分子在银镜表面上的吸附动力学．发现结晶紫的吸附是匀相的；表面形态的差异仅影响吸附速率常数，不改变多相因子（ｍ＝１）和脱附速率常数（ｋｄ＝０）．利用吸附等温线估算结晶紫分子在银镜上的吸附能，Ｕ≈５０ｋＪ／ｍｏｌ．不同银镜上ＣＶ分子的吸附能相同；但吸附位置密度有差异．银镜的增强效果与此有关．Abstract The adsorption of CV molecules on the surface of silver mirrors was detail studied. It was found that the adsorption of CV molecules on silver surfaces is homogeneous. The surface differences of silver mirrors only affect the adsorption rate constant ka, not changing the heterogeneity parameter, m=1, and desorption rate constant, kd=0. The adsorption energy of CV molecules on the surface of silver mirror was estimated by the adsorption isotherm, U≈50kJ/mol. The adsorption energies are identical and the densities of adsorption sites are different for different mirrors. The densiy of adsorption sites affects enhancement effect of silver mirror.

关 键 词：喇曼散射 银 结晶紫 吸附 银镜 

分 类 号：O647.31[理学—物理化学]