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Spontaneous Cracking of Graphite Oxide Sheet on Oxygen Deficient ZnO Film
Jin-yang Liu,Hong-bin Cai,Huan-yi Ding,Kun Zhang,Nan Pan,Xiao-ping Wang*
Author NameAffiliationE-mail
Jin-yang Liu Department of Physics, University of Science and Technology of China, Hefei 230026, China  
Hong-bin Cai Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Tech-nology of China, Hefei 230026, China  
Huan-yi Ding Department of Physics, University of Science and Technology of China, Hefei 230026, China  
Kun Zhang Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Tech-nology of China, Hefei 230026, China  
Nan Pan Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Tech-nology of China, Hefei 230026, China  
Xiao-ping Wang* Department of Physics, University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Tech-nology of China, Hefei 230026, China xpwang@ustc.edu.cn 
Abstract:
Graphite oxide (GO) is an important material of wide applications. Owing to its good mechanical property, the GO sheet is always expected to be stable and remains flat on various substrates. Here we demonstrate for the first time an unexpected behavior of the GO sheet on oxygen deficient ZnO film, namely the spontaneous cracking of the entire GO sheet into many small pieces. This unusual behavior has been carefully investigated by a series of control experiments and SEM, XPS and PL measurements. It is anticipated that the oxygen vacancies in the oxygen deficient ZnO film can annihilate epoxy groups of the GO sheet, resulting in the unzipping of the aligned epoxy groups on GO sheet. A prototype of the white light detector made from the cracked GO sheet is fabricated and the device demonstrates high stability and good reproducibility.
Key words:  Graphite oxide, Epoxy group, ZnO film, Oxygen vacancy, Photoresponse
FundProject:
氧化石墨烯在缺氧氧化锌薄膜表面的自发分裂
刘金养,蔡洪冰,丁怀义,张琨,潘楠,王晓平*
摘要:
第一次从实验上展现了氧化石墨烯在缺氧氧化锌薄膜表面的自发分裂,即完整的氧化石墨烯片会自发分裂成许多小片. 此现象的可能机制是:氧化石墨烯表面存在链状的环氧基团,缺氧氧化锌薄膜表面的氧空位能够吸收氧化石墨烯表面的环氧基团,影响氧化石墨烯表面的环氧基团链的稳定性,导致环氧基团链自发打开,从而使完整的氧化石墨烯片破裂成很多小片.
关键词:  氧化石墨烯,环氧基,氧化锌薄膜,氧空位,光响应
DOI:10.1063/1674-0068/27/01/87-91
分类号: