Abstract:

The surface morphology of the glutathione complex with cadmium and copper on silicon surface was studied by means of atomic force microscope (AFM).The results show that the glutathione-cadmium complex at a 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 complex on different buffer solution system 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 morphology orderly and uniformly.

Key words: Glutathione-cadmium complex, Glutathione-Copper complex, Atomic force microscope (AFM), Surface morphology