【摘 要】
：
Chitosan is a natural polymer with reduction property, and has good biocompatibility.In the present work, chitosan was used as a reducing and protective age
【出 处】
：
2012 Postdoctoral Symposium of China on Materials Science &a
论文部分内容阅读
Chitosan is a natural polymer with reduction property, and has good biocompatibility.In the present work, chitosan was used as a reducing and protective agent to prepare Fe3O4/Au hybrid nanoparticles through chemical reduction method in the presence of Fe3O4 nanoparticles.This approach did not contain any toxic materials.And the process is a simple and green route to prepare multi-functional composite nanoparticles.UV-Vis spectrum of the composite nanoparticles had a absorption peak at 535nm which was similar to Au nanoparticles.TEM showed that the nanoparticles had a diameter of ca.20nm and dispersed uniformly.In XRD spectrum, the peaks of Au and Fe3O4 were both observed.XPS and FT-IR indicated the nanoparticles were modified by chitosan.And TGA showed that the amount of chitosan was about 18.7%.
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