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Ruoff, Rodney S.
Center for Multidimensional Carbon Materials (CMCM)
Research Interests
  • Next generation carbons, ultrathin sp3-bonded carbon sheets, negative curvature (‘Schwartzites’) carbons, sp3/sp2 hybrid carbon materials, model compounds for novel carbon materials, reaction mechanisms

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

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Title
Oxygen-Promoted Chemical Vapor Deposition of Graphene on Copper: A Combined Modeling and Experimental Study
Author
Srinivasan, Bharathi MaduraiHao, YufengHariharaputran, RamanarayanRywkin, ShantiHone, James C.Colombo, LuigiRuoff, Rodney S.Zhang, Yong-Wei
Keywords
oxygen concentration;  growth rate;  nucleation density;  phase field model;  chemical vapor deposition
Issue Date
201809
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.12, no.9, pp.9372 - 9380
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 qualit.
URI
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DOI
http://dx.doi.org/10.1021/acsnano.8b04460
ISSN
1936-0851
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