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Shear‐Induced Interfacial Structural Conversion of Graphene Oxide to Graphene at Macroscale
Author(s) -
Gao Xue,
Zhang Jie,
Ju Pengfei,
Liu Jingzhou,
Ji Li,
Liu Xiaohong,
Ma Tianbao,
Chen Lei,
Li Hongxuan,
Zhou Huidi,
Chen Jianmin
Publication year - 2020
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202004498
Subject(s) - graphene , materials science , oxide , molecule , chemical physics , dangling bond , breakage , hydrogen bond , nanotechnology , composite material , silicon , organic chemistry , optoelectronics , chemistry , physics , metallurgy
The controllable adjustment of an ideal graphene structure on the surface/interface is important to achieve many of the potential characteristics and applications of graphene. Here, a phenomenon is observed in which friction can induce the structural conversion of graphene oxide (GO) to graphene perfectly on a macroscale sliding interface. The controlling factors and molecular interaction mechanism are further revealed by experiments and theoretical simulation. The results show that shear force drives the tribochemical reactions between the –OH group of GO and active bond of the counterpart, as well as the –OH groups of adjacent GO sheets, leading to the breakage of the COH bond. This leads to the transformation of the sp 3 C to sp 2 C, thereby forming a perfect six‐membered ring. The as‐broken hydroxyl groups combine with the dangling bond of the frictional pair or capture hydrogen from the hydroxyl group of the adjacent GO sheet and generate water molecules. This study provides more information on a novel method of manipulating the interfacial structure of graphene at a macroscale by a simple sliding action. The method also provides a new way of force sensing through the detection of the released H 2 O molecules.