Synthesis of Homogenous Bilayer Graphene on Industrial Cu Foil

doi:10.1088/0256-307X/31/6/067202

Chin. Phys. Lett.

2014, Vol. 31

Issue (06): 067202 DOI: 10.1088/0256-307X/31/6/067202

CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES

Synthesis of Homogenous Bilayer Graphene on Industrial Cu Foil

LUO Wen-Gang¹, WANG Hua-Feng¹, CAI Kai-Ming¹, HAN Wen-Peng¹, TAN Ping-Heng¹, HU Ping-An², WANG Kai-You^1**

¹State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
²Key Lab of Microsystem and Microstructure, Harbin Institute of Technology, Ministry of Education, Harbin 150080

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LUO Wen-Gang, WANG Hua-Feng, CAI Kai-Ming et al 2014 Chin. Phys. Lett. 31 067202

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Abstract We synthesize the homogenous graphene films on cheap industrial Cu foils using low pressure chemical vapor deposition. The quality and the number of layers of graphene are characterized by Raman spectra. Through carefully tuning the growth parameters, we find that the growth temperature, hydrocarbon concentration and the growth time can substantially affect the growth of high-quality graphene. Both single and bilayer large size homogenous graphenes have been synthesized in optimized growth conditions. The growth of graphene on Cu surface is found to be self ceasing in the bilayer graphene process with the low solubility of carbon in Cu. Furthermore, we have optimized the transfer process, and clear graphene films almost free from impurity are successfully transferred onto Si/SiO₂ substrates. The field effect transistors of bilayer graphene are fabricated, which demonstrates a maximum hole (electron) mobility of 4300 cm²V^?1s^?1 (1920 cm²V^?1s^?1) at room temperature.

Published: 26 May 2014

PACS:	72.80.Vp	(Electronic transport in graphene)
	68.65.Pq	(Graphene films)
	81.05.ue	(Graphene)

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https://cpl.iphy.ac.cn/10.1088/0256-307X/31/6/067202 OR https://cpl.iphy.ac.cn/Y2014/V31/I06/067202

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	LUO Wen-Gang
	WANG Hua-Feng
	CAI Kai-Ming
	HAN Wen-Peng
	TAN Ping-Heng
	HU Ping-An
	WANG Kai-You

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