ENGINEERING TECHNOLOGY

Graphene, formed directly by diamond, has higher strength


Recently, the joint research team of Shen Bin, School of Mechanical and Power Engineering, Shanghai Jiao Tong University, and Zhengzong Sun, Department of Chemistry, Fudan University, demonstrated a method of direct catalyzing diamond graphitization, and the graphene obtained by this method has a higher strength than traditional graphene. The results were published online On April 22 in the American Chemical Society’s Journal of Materials Chemistry.

Diamond and graphene are the most well-studied of carbon isotropes. Both are superior in mechanical, optical, and electrical properties, but are rarely used together in combination.

The graphene-diamond heterostructure connected by van der Wahls force has previously been reported. However, graphene-diamond hybrid heterostructures connected by covalent bonds have a unique advantage in meeting the demanding challenges of superhard material processing and high-power diamond electronics.

In this study, the joint team demonstrated a method of directly catalyzing the graphitization of diamond. Using this method, homogeneous graphene-diamond heterostructures with a covalent bond-binding interface can grow indiscriminately on all surfaces of the diamond. The newly synthesized graphene sheet extends seamlessly from the diamond lattice.

Diamond direct graphitization. Image from the paper

Further research shows that this unique covalent bond atomic structure makes the newly produced graphene sheet produce an unprecedented interfacial binding strength, which greatly exceeds the inherent strength of traditional graphene. (Source: China Science Daily Zheng Jinwu)

Related paper information:https://doi.org/10.1021/acs.chemmater.1c04322



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