Adsorption Behaviors of 4-Mercaptobenzoic Acid on Silver and Gold Films  

巯基苯甲酸在电化学沉积的金／银薄膜表面的吸附行为

作　　者：马文强[1,2] 方炎[2] 郝刚领[1] 王伟国[1] 

机构地区：[1]延安大学物理电子系,延安716000 [2]首都师范大学物理系,北京100037

出　　处：《Chinese Journal of Chemical Physics》2010年第6期659-663,745,共6页化学物理学报（英文）

摘　　要：The adsorption behaviors of 4-mercaptobenzoic acid on silver and gold nanoparticles were studied by surface-enhanced Raman scattering （SERS） and density functional theory. The silver and gold films by electrodeposition have the same excellent characteristics as SERS- active substrates. At the same, the SERS spectra indicate that 4-mercaptobenzoic acid molecules are adsorbed on the surfaces of gold nanoparticles through the S atom, and that the carboxyl group is far away from surface of gold nanoparticles, and that there is a certain angle between the plane of benzene ring and gold film. However, 4-mercaptobenzoic acid molecules are adsorbed on the surfaces of silver nanoparticles through the carboxyl group, and the S atom is far away from surface of silver nanoparticles, and there is also a certain angle between the plane of benzene ring and the surface of silver nanoparticles. Here it is demonstrated the calculated Raman frequencies are in good agreement with experimental values, and the calculated Raman frequencies are also helpful to infer the adsorption behaviors of 4- mereaptobenzoic acid molecules.

关 键 词：Adsorption behavior Surface-enhanced Raman scattering Density functional theory 

分 类 号：O[理学]