期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 16, 页码 18924-18933出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c02726
关键词
superlubricity; fullerene derivatives; macrocycles; host-guest assembly; interaction energy
资金
- National Natural Science Foundation of China [51875303, 21773041, 21972031]
- National Basic Research Program of China [2016YFA0200700]
Fullerenes have been recognized as good candidates for solid lubricants. In this study, the microscale superlubricity of fullerene derivatives was accomplished by the construction of regular host-guest assembly structures. Herein, the host-guest assembly structures of fullerene derivatives were successfully constructed on a highly oriented pyrolytic graphite (HOPG) surface by introducing the macrocycles as the templates and were explicitly revealed by scanning tunneling microscopy (STM). Meanwhile, the nanotribological properties of the host-guest assemblies were measured using atomic force microscopy (AFM), revealing ultralow friction coefficients of 0.003-0.008, which could be attributed to the restriction on removal of fullerene molecules after introducing the templates. The interaction energies were calculated by density functional theory (DFT) method, which indicates the correlation between friction coefficients and interaction strength in the hostguest assemblies. The effort on fullerene-related superlubricity could extend the solid superlubrication systems and provide a novel pathway to explore the friction mechanisms at the molecular level.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据