Towards super-clean graphene

Li Lin, Jincan Zhang, Haisheng Su, Jiayu Li, Luzhao Sun, Zihao Wang, Fan Xu, Chang Liu, Sergei Lopatin, Yihan Zhu, Kaicheng Jia, Shulin Chen, Dingran Rui, Jingyu Sun, Ruiwen Xue, Peng Gao, Ning Kang, Yu Han, H. Q. Xu, Yang Cao, K. S. Novoselov, Zhongqun Tian, Bin Ren, Hailin Peng () and Zhongfan Liu ()
Additional contact information
Li Lin: Peking University
Jincan Zhang: Peking University
Haisheng Su: Xiamen University
Jiayu Li: Peking University
Luzhao Sun: Peking University
Zihao Wang: University of Manchester
Fan Xu: Xiamen University
Chang Liu: Xiamen University
Sergei Lopatin: King Abdullah University of Science and Technology
Yihan Zhu: King Abdullah University of Science and Technology
Kaicheng Jia: Peking University
Shulin Chen: Peking University
Dingran Rui: Peking University
Jingyu Sun: Soochow University
Ruiwen Xue: Department of Chemical and Biomolecular Engineering Hong Kong University of Science and Technology Clear Water Bay
Peng Gao: Collaborative Innovation Center of Quantum Matter
Ning Kang: Peking University
Yu Han: King Abdullah University of Science and Technology
H. Q. Xu: Peking University
Yang Cao: Xiamen University
K. S. Novoselov: University of Manchester
Zhongqun Tian: Xiamen University
Bin Ren: Xiamen University
Hailin Peng: Peking University
Zhongfan Liu: Peking University

Nature Communications, 2019, vol. 10, issue 1, 1-7

Abstract: Abstract Impurities produced during the synthesis process of a material pose detrimental impacts upon the intrinsic properties and device performances of the as-obtained product. This effect is especially pronounced in graphene, where surface contamination has long been a critical, unresolved issue, given graphene’s two-dimensionality. Here we report the origins of surface contamination of graphene, which is primarily rooted in chemical vapour deposition production at elevated temperatures, rather than during transfer and storage. In turn, we demonstrate a design of Cu substrate architecture towards the scalable production of super-clean graphene (>99% clean regions). The readily available, super-clean graphene sheets contribute to an enhancement in the optical transparency and thermal conductivity, an exceptionally lower-level of electrical contact resistance and intrinsically hydrophilic nature. This work not only opens up frontiers for graphene growth but also provides exciting opportunities for the utilization of as-obtained super-clean graphene films for advanced applications.

Date: 2019
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DOI: 10.1038/s41467-019-09565-4

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