碳包覆磁性金属纳米胶囊的制备及表征

THE PREPARATION AND CHARACTERIZATION OF MAGNETIC METAL NANOCAPSULES COATED WITH CARBON

采用直流电弧等离子体法制备出表面包覆碳膜的金属纳米颗粒，这种纳米颗粒通常被称为“纳米胶囊”。其表面包覆气密的碳膜，具有良好的抗氧化性和稳定性。在甲烷气氛中蒸发各种磁性金属可获得具有良好物理化学性能的磁性纳米胶囊。对这种纳米胶囊进行了Ｘ射线衍射、Ｘ光电子谱、俄歇能谱、氧含量测定及ＨＲＴＥＭ、磁性分析等研究，提供了确定纳米颗粒新型壳－核结构的可靠实验依据。

Metallic nanoparticles coated with carbon films are produced by DC arc plasma,which are usually called nanocapsules.The gas tight cabon films have a good antioxidizability and stability.The magnetic nanocapsules with good physicochemical performance are obtained through vaporizing various magnetic metals in the methane atmosphere.The reliable experimental bases for determining the new shell nucleus structure of nanoparticles were provided by X ray diffraction,X ray electron spectrometry,Auger energy spectrometry,oxygen determination,HRTEM and magnetic properties analysis.