New insight into direct electrical characterization of graphene utilizing cleavage-based micro four probe. (4th July 2016)

• Record Type: Journal Article
• Authors: Wang, Renxin; Zhang, Hongze; Wang, Wen; Zhang, Yushi; Liu, Yuan; Xu, Wei; Li, Zhihong
• Is Part Of: Journal of physics. Volume 49:Number 29(2016)
• Publication Date: 2016-07-04
• Subjects: graphene -- conductivity -- approximation -- cleavage -- micro four probes; Physics -- Periodicals; 530
• DOI: 10.1088/0022-3727/49/29/295108
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: To characterize the electrical properties of arbitrarily shaped small graphene flakes in a direct way, a kind of cleavage-based micro four probe (C-M4P) is developed and a finite element analysis (FEA)-aided approximation method is subsequently proposed. The cleavage process is put forward in the manufacturing of C-M4Ps, which fulfills the releasing of the C-M4P in an ingenious manner. Specifically, we investigate the cleavage process based on simulation and the scanning electron micrograph (SEM). Furthermore, the FEA-aided approximation method brings new insight into the conductivity characterization of arbitrarily shaped small graphene flakes when the geographic correction factor is non-negligible but complicated to figure out. The electrical properties of monolayer graphene flakes applied with back gate voltage are detected by the C-M4P and analyzed through the FEA-aided approximation method, which are proved to be competent for small graphene flake characterization.