Significant Enhanced Mechanical Properties of Suspended Graphene Film by Stacking Multilayer CVD Graphene Films
Binbin Xiao,
Mengqing Yin,
Wanfa Li,
Lingyan Liang,
Shixun Dai,
Xiaohui Zhang,
Wei Wang,
Zhaoping Liu
Affiliations
Binbin Xiao
Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China
Mengqing Yin
Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China
Wanfa Li
Key Laboratory of Advanced Nano Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Lingyan Liang
Key Laboratory of Advanced Nano Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Shixun Dai
Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China
Xiaohui Zhang
CRRC Industrial Academy Co., Ltd., Beijing 100039, China
Wei Wang
Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, CAS Engineering Laboratory for Graphene, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Zhaoping Liu
Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, CAS Engineering Laboratory for Graphene, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Suspended graphene film is of great significance for building high-performance electrical devices. However, fabricating large-area suspended graphene film with good mechanical properties is still a challenge, especially for the chemical vapor deposition (CVD)-grown graphene films. In this work, the mechanical properties of suspended CVD-grown graphene film are investigated systematically for the first time. It is found that monolayer graphene film is hard to maintain on circular holes with a diameter of tens of micrometers, which can be improved greatly by increasing the layer of graphene films. The mechanical properties of CVD-grown multilayer graphene films suspended on a circular hole with a diameter of 70 µm can be increased by 20%, and multilayer graphene films prepared by layer-layer stacking process can be increased by up to 400% for the same size. The corresponding mechanism was also discussed in detail, which might pave the way for building high-performance electrical devices based on high-strength suspended graphene film.
