Edge control of graphene domains grown on hexagonal boron nitride

Lingxiu Chen; Haomin Wang; Shujie Tang; Li He; Hui Shan Wang; Xiujun Wang; Hong Xie; Tianru Wu; Hui Xia; Tianxin Li; Xiaoming Xie

doi:10.1039/C7NR02578E

Edge control of graphene domains grown on hexagonal boron nitride†

Lingxiu Chen,

^abcd Haomin Wang,*^ac Shujie Tang,^a Li He,^ae Hui Shan Wang,^af Xiujun Wang,^acd Hong Xie,^ac Tianru Wu,^ac Hui Xia,^g Tianxin Li^g and Xiaoming Xie*^abc

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* Corresponding authors

^a State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
E-mail: hmwang@mail.sim.ac.cn, xmxie@mail.sim.ac.cn

^b School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China

^c CAS Center for Excellence in Superconducting Electronics, Chinese Academy of Sciences, Shanghai 200050, China

^d School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

^e School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China

^f School of Physics and Electronics, Central South University, Changsha 410083, China

^g National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China

Abstract

The edge structure of graphene has a significant influence on its electronic properties. However, control over the edge structure of graphene domains on insulating substrates is still challenging. Here we demonstrate edge control of graphene domains on hexagonal boron nitride (h-BN) by modifying the ratio of working-gases. Edge directions were determined with the help of both moiré patterns and atomic-resolution images obtained via atomic force microscopy measurements. It is believed that the variation of graphene edges is mainly attributed to different growth rates of armchair and zigzag edges. This work demonstrates a potential approach to fabricate smooth-edge graphene ribbons on h-BN.

Nanoscale

Edge control of graphene domains grown on hexagonal boron nitride†

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Edge control of graphene domains grown on hexagonal boron nitride

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