Spontaneous Cracking of Graphite Oxide Sheet on Oxygen Deficient ZnO Film  

氧化石墨烯在缺氧氧化锌薄膜表面的自发分裂

作　　者：刘金养[1] 蔡洪冰[2] 丁怀义[1] 张琨[2] 潘楠[2] 王晓平[1,2] 

机构地区：[1]中国科学技术大学化学物理系,合肥230026 [2]中国科学技术大学合肥微尺度物质科学国家实验室(筹),合肥230026

出　　处：《Chinese Journal of Chemical Physics》2014年第1期87-91,I0004,共6页化学物理学报（英文）

基　　金：ACKNOWLEDGMENTS This work was supported by the Ministry of Science and Technology of China （No.2011CB921403）, the Chinese Academy of Science （No.XDB01020000）, and the National Natural Science Foundation of China.

摘　　要：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.

关 键 词：Graphite oxide Epoxy group ZnO film Oxygen vacancy PHOTORESPONSE 

分 类 号：O6[理学—化学]