石墨烯
材料科学
化学气相沉积
纳米技术
微晶
碳纤维
无定形固体
无定形碳
石墨烯泡沫
化学工程
作者
Liu Xiaoting,Jincan Zhang,Wendong Wang,Wei Zhao,Heng Chen,Bingyao Liu,Mengqi Zhang,Fushun Liang,Lijuan Zhang,Rui Zhang,Ning Li,Zhang Yuexin,Yuchen Liu,Kaicheng Jia,Luzhao Sun,Yixuan Zhao,Peng Gao,Qinghong Yuan,Li Lin,Hailin Peng,Zhongfan Liu
标识
DOI:10.1007/s12274-021-3922-x
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 as-formed 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.
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