A Highly Practical Route for Large-Area, Single Layer Graphene from Liquid Carbon Sources such as Benzene and Methanol

Published

October 28, 2011

Author(s)

Gadipelli Srinivas, Irene G. Calizo, Jamie Ford, Guangjun Cheng, Angela R. Hight Walker, Taner N. Yildirim

Abstract

Through a detailed systematic study, we determined the parameters critical for high-quality, single-layer graphene formation and developed a straightforward synthesis that requires no explosive hydrogen or methane gas flow. The synthesis is further simplified by using only a liquid carbon source such as methanol. Of over a dozen liquid carbon sources studied, methanol is found to be unique in that it acts as both a carbon/hydrogen source and an inhibitor to amorphous carbon growth. No deposition of amorphous carbon was observed, regardless of vapor pressure, unlike methane and other hydrocarbons. Finally, we describe a protocol to control graphene growth to a single side or selected location on the copper substrate, which is required for most device applications. Using our novel methods, we have prepared high-quality, single-layer graphene samples at the inch scale that have been thoroughly characterized with Raman spectroscopy, optical transmittance, scanning electron microscopy and sheet resistance measurements. Our method is safe, simple, and economical and will be of value to both fundamental researchers and nanodevice engineers.

Citation

Journal of Materials Chemistry

Volume

21

Pub Type

Journals

Download Paper

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Keywords

Graphene, Chemical Vapor Deposition, Raman Spectroscopy, Wafer-Scale Single Layer Graphene

Citation

Srinivas, G. , Calizo, I. , Ford, J. , Cheng, G. , Hight Walker, A. and Yildirim, T. (2011), A Highly Practical Route for Large-Area, Single Layer Graphene from Liquid Carbon Sources such as Benzene and Methanol, Journal of Materials Chemistry, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=907820 (Accessed May 9, 2025)