The role of Cu crystallographic orientations towards growing superclean graphene on meter-sized scale  

作　　者：Xiaoting Liu Jincan Zhang Wendong Wang Wei Zhao Heng Chen Bingyao Liu Mengqi Zhang Fushun Liang Lijuan Zhang Rui Zhang Ning Li Yuexin Zhang Yuchen Liu Kaicheng Jia Luzhao Sun Yixuan Zhao Peng Gao Qinghong Yuan Li Lin Hailin Peng Zhongfan Liu 

机构地区：[1]Center for Nanochemistry,Beijing Science and Engineering Center for Nanocarbons,Beijing National Laboratory for Molecular Science,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China [2]Academy for Advanced Interdisciplinary Studies,Peking University,Beijing 100871,China [3]Beijing Graphene Institute,Beijing 100095,China [4]Department of Engineering,University of Cambridge,Cambridge,CB30FA,UK [5]School of Physics and Astronomy,University of Manchester,Manchester,M139PL,UK [6]State Key Laboratory of Precision Spectroscopy,School of Physics and Electronic Science,East China Normal University,Shanghai 200241,China [7]Electron Microscopy Laboratory and International Center for Quantum Materials,School of Physics,Peking University,Beijing 100871,China [8]Centre for Theoretical and Computational Molecular Science,Australian Institute for Bioengineering and Nanotechnology,The University of Queensland,Brisbane,QLD 4072,Australia [9]School of Materials Science and Engineering,Peking University,Beijing 100871,China

出　　处：《Nano Research》2022年第4期3775-3780,共6页纳米研究（英文版）

基　　金：The authors thank Beijing National Laboratory for Molecular Science;This work was supported by Beijing National Laboratory for Molecular Sciences(No.BNLMS-CXTD-202001);This work was financially supported by the Beijing Municipal Science&Technology Commission(Nos.Z181100004818001 and Z201100008720005);the National Basic Research Program of China(No.2016YFA0200101);the National Natural Science Foundation of China(No.52072042).

摘　　要：Chemical vapor deposition(CVD)-grown graphene films on Cu foils,exhibiting fine scalability and high quality,are still suffering from the adverse impact of surface contamination,i.e.,amorphous carbon.Despite the recent successful preparation of superclean graphene through Cu-vapor-assisted reactions,the formation mechanism of amorphous carbon remains unclear,especially with regard to the functions of substrates.Herein,we have found that the crystallographic orientations of underlying metal substrates would determine the cleanness of graphene in such a way that slower diffusion of active carbon species on asformed graphene-Cu(100)surface is the key factor that suppresses the formation of contamination.The facile synthesis of clean graphene is achieved on the meter-sized Cu(100)that is transformed from the polycrystalline Cu foils.Furthermore,a clean surface of graphene on Cu(100)ensures the reduction of transfer-related polymer residues,and enhanced optical and electrical performance,which allows for versatile applications of graphene in biosensors,functioning as flexible transparent electrodes.This work would offer a promising material platform for the fundamental investigation and create new opportunities for the advanced applications of high-quality graphene films.

关 键 词：superclean graphene Cu crystallographic orientations Cu(100)foil improved electrical performance 

分 类 号：O7[理学—晶体学]