文献类型：期刊文献

英文题名：Background pressure does matter for the growth of graphene single crystal on copper foil: Key roles of oxygen partial pressure

作者：Cao, Qiao-Jun[1];Shi, Bi-Yun[1];Dou, Wei-Dong[1,2];Tang, Jian-Xin[2];Mao, Hong-Ying[3]

机构：[1]Shaoxing Univ, Lab Low Dimens Carbon Mat, Phys Dept, Shaoxing 312000, Peoples R China;[2]Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Peoples R China;[3]Hangzhou Normal Univ, Dept Phys, Hangzhou 310036, Zhejiang, Peoples R China

年份：2018

卷号：138

起止页码：458

外文期刊名：CARBON

收录：SCI-EXPANDED(收录号：WOS:000442635300054)、、EI(收录号：20183805825677)、Scopus(收录号：2-s2.0-85053202493)、WOS

基金：The work described in this paper was supported by grants from the National Natural Science Foundation of China (NSFC Grant Nos. 61474077 and 61401136) and Natural Science Foundation of Zhejiang Province (Grant Nos. LY18F010019 and LQ13A050002).

语种：英文

外文关键词：Copper - Crystallinity - Crystallization - Graphene - Nucleation - Oxygen - Partial pressure - Single crystals - Substrates

外文摘要：Understanding the effect of minor elements such as oxygen and nitrogen on the growth of graphene is crucial to fabrication of graphene single crystals (GSC) with large grain size. In this study, we investigate the nucleation and growth behavior of graphene domains on commercial copper foils as a function of oxygen partial pressure in the chemical vapor deposition (CVD) chamber. To achieve repeatable fabrication of GSC, it is essential to backfill CVD chamber with moderate amount of oxygen during substrate annealing and graphene growth stages. In another words, the relatively higher background pressure in CVD chamber is beneficial to the fabrication of GSC. In addition to reducing the nucleation density of graphene grains, the backfilled oxygen induces (111) reconstruction of copper foil upon annealing at 1050 degrees C for 2 h. The oxygen-induced crystallinity of copper substrate should account for the growth of hexagonal-shaped GSC of millimeter-scale on commercial copper foil with single layer nature. (C) 2018 Elsevier Ltd. All rights reserved.