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 CaoK. S. Novoselov, Zhongqun Tian, Bin Ren, Hailin Peng, Zhongfan Liu

Research output: Contribution to journalArticlepeer-review

139 Scopus citations


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.
Original languageEnglish (US)
JournalNature Communications
Issue number1
StatePublished - Apr 23 2019


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