Remote catalyzation for direct formation of graphene layers on oxides

Nano Letters
Po-Yuan TengPo-Wen Chiu

Abstract

Direct deposition of high-quality graphene layers on insulating substrates such as SiO(2) paves the way toward the development of graphene-based high-speed electronics. Here, we describe a novel growth technique that enables the direct deposition of graphene layers on SiO(2) with crystalline quality potentially comparable to graphene grown on Cu foils using chemical vapor deposition (CVD). Rather than using Cu foils as substrates, our approach uses them to provide subliming Cu atoms in the CVD process. The prime feature of the proposed technique is remote catalyzation using floating Cu and H atoms for the decomposition of hydrocarbons. This allows for the direct graphitization of carbon radicals on oxide surfaces, forming isolated low-defect graphene layers without the need for postgrowth etching or evaporation of the metal catalyst. The defect density of the resulting graphene layers can be significantly reduced by tuning growth parameters such as the gas ratios, Cu surface areas, and substrate-to-Cu distance. Under optimized conditions, graphene layers with nondiscernible Raman D peaks can be obtained when predeposited graphite flakes are used as seeds for extended growth.

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Citations

Mar 12, 2015·Nature Communications·Shujie TangMianheng Jiang
Mar 7, 2013·The Journal of Physical Chemistry. a·Chun-Da LiaoYit-Tsong Chen
Jul 6, 2017·Chemical Society Reviews·Guoke ZhaoHongwei Zhu
Feb 6, 2016·Chemical Society Reviews·Xin ChenYunqi Liu
Sep 1, 2017·Chemical Society Reviews·Viet Phuong PhamJae-Young Choi
Aug 30, 2012·Advanced Materials·Nathan O WeissXiangfeng Duan
Dec 17, 2016·Advanced Science·Qin ZhangLei Fu
Dec 12, 2018·Advanced Materials·Jinxin Liu, Lei Fu
Apr 25, 2019·Nature Communications·Li LinZhongfan Liu
Nov 18, 2018·Advanced Materials·Zhaolong ChenZhongfan Liu
Sep 26, 2017·ACS Applied Materials & Interfaces·Chao-Hui YehPo-Wen Chiu
May 7, 2019·Journal of the American Chemical Society·Kaicheng JiaZhongfan Liu
Jan 18, 2019·ACS Applied Materials & Interfaces·Chao-Hui YehPo-Wen Chiu
Sep 2, 2018·ACS Applied Materials & Interfaces·Lingzhi CuiZhongfan Liu
Nov 20, 2021·Science Advances·Zhaolong ChenZhongfan Liu

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