journal article·2017-12-26Open access

Wrinkle-Free Single-Crystal Graphene Wafer Grown on Strain-Engineered Substrates

Bing Deng, Zhenqian Pang, Shulin Chen, Xin Li, Caixia Meng, Jiayu Li, Mengxi Liu, Juanxia Wu, Yue Qi, Wenhui Dang, Hao Yang, Yanfeng Zhang, Jin Zhang, Ning Kang, Hongqi Xu, Qiang Fu, Xiaohui Qiu, Peng Gao, Yujie Wei, Zhongfan Liu, Hailin Peng

ACS Nano· Volume 11· Issue 12

Abstract

Wrinkles are ubiquitous for graphene films grown on various substrates by chemical vapor deposition at high temperature due to the strain induced by thermal mismatch between the graphene and substrates, which greatly degrades the extraordinary properties of graphene. Here we show that the wrinkle formation of graphene grown on Cu substrates is strongly dependent on the crystallographic orientations. Wrinkle-free single-crystal graphene was grown on a wafer-scale twin-boundary-free single-crystal Cu(111) thin film fabricated on sapphire substrate through strain engineering. The wrinkle-free feature of graphene originated from the relatively small thermal expansion of the Cu(111) thin film substrate and the relatively strong interfacial coupling between Cu(111) and graphene, based on the strain analyses as well as molecular dynamics simulations. Moreover, we demonstrated the transfer of an ultraflat graphene film onto target substrates from the reusable single-crystal Cu(111)/sapphire growth substrate. The wrinkle-free graphene shows enhanced electrical mobility compared to graphene with wrinkles.
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Research context

OpenAlex topics: Graphene research and applications · Advanced Materials and Mechanics · Advanced Sensor and Energy Harvesting Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center for Nanochemistry (CNC), Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

LNM, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China

Electron Microscopy Laboratory, International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China

State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China

CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China

University of Chinese Academy of Sciences, Beijing 100049, China

State Key Laboratory of Catalysis, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China

Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China

Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China

Collaborative Innovation Center of Quantum Matter, Beijing 100871, China

Beijing Graphene Institute (BGI), Beijing 100094, China

Funding

Peking University · Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Chinese Academy of Sciences · Beijing Municipal Science and Technology Commission

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