Preparation technique of graphite core-shell structure

Abstract

The invention discloses a preparation technique of a graphite core-shell structure. The preparation technique comprises the step that a copper film is prepared. The method for preparing the copper film comprises the steps that an aluminum film with the thickness being 100 nm is prepared through DPS-III ultrahigh-vacuum facing-target magnetron sputter coating, a single crystal Si100 is used as a substrate, and a high-purity aluminum target with the diameter being 5 cm is used as a target material; and after ultrasonic cleaning is conducted on the substrate Si100 with acetone, alcohol and deionized water for 15 min, the substrate Si100 is placed onto a sample table of coating equipment; and the aluminum film starts to be deposited on the substrate Si100 after the background pressure of a vacuum chamber is lower than 3*10<4> Pa, and in the deposition process, the gas flow of Ar is 50 sccm, and the sputtering pressure is 0.3 Pa. The preparation technique of the graphite core-shell structure has the complementary advantages of the characteristics of graphite and copper, and the graphite core-shell structure (GS / CC) material is prepared; and the field emission performance of the core-shell structure is remarkably improved while the cost is reduced, and the preparation technique has the application potential in the fields such as the information technology field and the biomedicine field.

Description

technical field [0001] The invention belongs to the field of graphite, and in particular relates to a preparation process of a graphite core-shell structure. Background technique [0002] Generally speaking, the core has certain functional properties, while the outer shell can protect or even enhance the performance of the core, or can introduce new properties. The core-shell composite material can be a zero-to-three-dimensional nano- or micron-sized structural material. The core-shell structure usually exhibits better physical and chemical properties than a single component, and the enhanced performance is mainly attributed to the role of the shell. These advantages make the core-shell structure in optics, magnetism, biology, catalysis, energy conversion and storage. and so on have shown potential application value. Although the core-shell structure has been applied in many fields, it is still necessary to prepare a new core-shell structure and broaden the application rang...

AI Technical Summary

Problems solved by technology

However, the core-shell structures prepared by these methods are some noble metals (silver, platinum, gold) and magnetic metals (iron, cobalt, nickel) tightly wrapped by graphite layers, which greatly limits its application.