谷光甘肽-Cd(Ⅱ)、Cu(Ⅱ)配合物在硅片表面形貌的AFM分析

Surface Morphology of Glutathione Complex with Cadmium(Ⅱ) and Copper(Ⅱ) via Atomic Force Microscope

用原子力显微镜观察了谷胱甘肽-镉、铜配合物在硅片表面的形貌。低浓度时,谷胱甘肽-镉配合物主要以类球体颗粒无序地分散在基底表面,其表观高度和长度分别为(3.6±0.1)nm和(60±10)nm。随着浓度的增加,出现由小颗粒聚集而成的簇体。不同的缓冲溶液体系对谷胱甘肽-镉配合物的形貌无明显影响。谷胱甘肽-铜配合物首先由均匀的球体颗粒聚集成长链,然后随链延伸方向的不同,形成类似网状和线团状2种表面形貌,显示良好的方向性和均匀性。

The surface morphology of glutathione（GSH） complex with cadmium and copper on silicon surface was studied by means of atomic force microscopy（AFM）.The results show that the GSH-Cd（Ⅱ） complex at diluted concentration dispersed disorderly on the surface with spheroid or cylinder states.The apparent height of the spheroid is（3.6±0.1） nm and the width is（60±10） nm.The complex aggregated with the increase of its concentration,the dimmers and multimers aggregated from monomers formed clusters.The difference of AFM images of GSH-Cd（Ⅱ） complex in different buffer solution systems is small.For GSH-Cu complex,firstly,some string bead chains were formed by aggregation of the uniform spheroid particles,then,under the influence of different directions,the long chains formed two kinds of different surface morphologies orderly and uniformly.