Electric field controlled superlubricity of fullerene-based host–guest assembly
作者机构：State Key Laboratory of TribologyTsinghua UniversityBeijing 100084China CAS Key Laboratory of Standardization and Measurement for NanotechnologyCAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology(NCNST)Beijing 100190China College of Chemical EngineeringJiangsu Key Lab of Biomass-based Green Fuels and ChemicalsNanjing Forestry UniversityNanjing 210037China Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of EducationHangzhou Normal UniversityHangzhou 310012China Center of Materials Science and Optoelectonics EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2023年第16卷第1期
页 面：583-588页
核心收录：
学科分类：08[工学] 080203[工学-机械设计及理论] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0702[理学-物理学]
基 金：This work was financially supported by the National Basic Research Program of China(No.2017YFA0205000) the National Natural Science Foundation of China(Nos.51875303 and 21972031) the Strategic Priority Research Program of Chinese Academy of Sciences(No.XDB36000000).
主 题：superlubricity electric field friction control fullerene derivative host-guest assembly
摘 要：Controlling friction by the electric field is a promising way to improve the tribological performance of a variety of movable mechanical systems.In this work,the assembly structure and microscale superlubricity of a host–guest assembly are effectively controlled by the electric field.With the help of the scanning tunneling microscopy(STM)technique,the host–guest assembly structures constructed by the co-assembly of fullerene derivative(Fluorene-C60)with macrocycles(4B2A and 3B2A)are explicitly characterized.Combined with density functional theory(DFT),the distinct different assembly behaviors of fullerene derivatives are revealed at different probe biases,which is attributed to the molecular polarity of the fullerene derivative.Through the control on the adsorption behavior,the friction coefficient of host–guest assembly is demonstrated to be controllable in the electric field by using atomic force microscopy(AFM).At positive probe bias,the friction coefficient of the host–guest assembly is significantly reduced and achieves superlubricity(μmin=0.0049).The efforts not only help us gain insight into the host–guest assembly mechanism controlled by the electric field,but also promote the further application of fullerene in micro-electro-mechanical systems(MEMS).
维普期刊数据库