谷胱甘肽在汞表面吸附与自组装行为的原子力显微镜研究  

Studies on Adsorbing and Self-Assembling Properties of Glutathione at Mercury Surface with Atomic Force Microscope

作　　者：阮湘元[1] 彭敏[1] 徐经伟[2] 蒋致成[1] 陈小明[3] 李益恒[3] 

机构地区：[1]东莞理工学院应用化学系,东莞523106 [2]中国科学院长春应用化学研究所电分析和光谱分析中心,长春130022 [3]湘潭大学化学院,湘潭411105

出　　处：《分析化学》2005年第11期1587-1589,共3页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金项目(20375008);广东省重点攻关项目(No.2003A3060302);广东省自然科学基金项目(No.5007902)

摘　　要：用原子力显微镜研究谷胱甘肽(GSH)在汞表面的吸附与自组装状态.谷胱甘肽在汞表面首先形成非均匀地堡状吸附体,大部分单个吸附体高约10～13 nm,半高直径约20 nm.约每6个单吸附体以近似等边三角形形态自组装成一簇.随着吸附时间的延长,GSH 可在汞表面自组装成约15 nm的多分子层紧密层.与此同时,在紧密吸附层上可自组装成高约90～170 nm、半高直径约130 nm的特大吸附簇.Adsorbing and self-assembling properties of glutathione （GSH） at mercury surface were studied with atomic force microscope （AFM）. First, fort-like bodies of adsorbed GSH were discontinuously and unevenly formed at mercury surface . Most of the fort-like bodies are about 10 - 13 nm in high with about diameter of 20rim at half-height. The largest one is about 31 nm in high with diameter of about 52 nm at halfheight and the smallest one is about 4 nm in high. Fort-like bodies of adsorbed GSH were further self-assembled into even triangles, which were composed of 6 bodies with 3 bodies in each of side. Secondly, GSH in solution were adsorbed and assembled continuously at the surface and filled among fort-like bodies to form compacted layer, meanwhile, unusual larger fort-like bodies were formed with distribution per μm^2. The thickness of the compacted layer of GSH was about 15 nm, equaling to abo GSH molecule in length. of 2.3 - 3.3 bodies ut 11 times of single

关 键 词：谷胱甘肽 表面吸附 异相界面自组装 原子力显微镜 自组装行为 汞 等边三角形 表面自组装 吸附时间 非均匀 

分 类 号：O647.31[理学—物理化学]