科研：EMC服务数据在JCR1区Carbon发表论文阅读次数 [1539] 发布时间 :2019-05-06 17:13:45

基于电镜中心（EMC）FEI电镜数据，深圳大学纳米所在JCR1区期刊carbon上发表论文，具体如下：

Contact-focusing electron flow induced nanosized graphene sheets
formation in amorphous carbon film for fast low-friction
Kun Sun a, b, Xue Fan b, Weiqiang Zhang a, b, Peidong Xue a, b, Dongfeng Diao b, *

a Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi'an Jiaotong University, Xi'an, 710049, China
b Institute of Nanosurface Science and Engineering (INSE), Shenzhen University, Shenzhen, 518060, China

           We report a method of contact-focusing electron flow (CFEF) by applying direct current (DC) at the sliding interface between a-C film and steel ball. With the CFEF-method, nanosized graphene sheets were in-situ fabricated at contact area, which induced a fast low-friction behavior. The developments of the friction behavior with different DC values and normal loads were examined for investigating the CFEF induced low-friction. The friction coefficient dropped one order of magnitude from 0.2 to 0.02 under CFEF-condition, and the run-in period was close to zero. Three key factors for the fast low-friction were found in this study: (1) CFEF at the contact area excited the carbon structural transition from amorphous to graphene sheets. (2) Friction transferred the nanosized graphene sheets to the steel ball. (3) CFEF friction coupling effect supplied the nanosized graphene sheets into the sliding interface for lowfriction. This work shed light on the in-situ fabrication of nanosized graphene sheets at carbon surface and the low-friction application with CFEF-method.