Oxygen-Promoted Chemical Vapor Deposition of Graphene on Copper: A Combined Modeling and Experimental Study

ACS Nano
Bharathi Madurai SrinivasanYong-Wei Zhang

Abstract

Mass production of large, high-quality single-crystalline graphene is dependent on a complex coupling of factors including substrate material, temperature, pressure, gas flow, and the concentration of carbon and hydrogen species. Recent studies have shown that the oxidation of the substrate surface such as Cu before the introduction of the C precursor, methane, results in a significant increase in the growth rate of graphene while the number of nuclei on the surface of the Cu substrate decreases. We report on a phase-field model, where we include the effects of oxygen on the number of nuclei, the energetics at the growth front, and the graphene island morphology on Cu. Our calculations reproduce the experimental observations, thus validating the proposed model. Finally, and more importantly, we present growth rate from our model as a function of O concentration and precursor flux to guide the efficient growth of large single-crystal graphene of high quality.

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Citations

Sep 14, 2020·The European Physical Journal. E, Soft Matter·Simbarashe FashuNan Wang
Dec 18, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Shuai ChenYong-Wei Zhang
Aug 8, 2019·The Journal of Physical Chemistry Letters·Siyu WuQinghong Yuan
Nov 13, 2019·ACS Applied Materials & Interfaces·Shuai ChenYong-Wei Zhang

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