Kinetics of Low-Pressure, Low-Temperature Graphene Growth: Toward Single-Layer, Single-Crystalline Structure
- 29 October 2012
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Nano
- Vol. 6 (11), 10276-10286
- https://doi.org/10.1021/nn3041446
Abstract
Graphene grown on metal catalysts with low carbon solubility is a highly competitive alternative to exfoliated and other forms of graphene, yet a single-layer, single-crystal structure remains a challenge because of the large number of randomly oriented nuclei that form grain boundaries when stitched together. A kinetic model of graphene nucleation and growth is developed to elucidate the effective controls of the graphene island density and surface coverage from the onset of nucleation to the full monolayer formation in low-pressure, low-temperature CVD. The model unprecedentedly involves the complete cycle of the elementary gas-phase and surface processes and shows a precise quantitative agreement with the recent low-energy electron diffraction measurements and also explains numerous parameter trends from a host of experimental reports. These agreements are demonstrated for a broad pressure range as well as different combinations of precursor gases and supporting catalysts. The critical role of hydrogen in controlling the graphene nucleation and monolayer formation is revealed and quantified. The model is generic and can be extended to even broader ranges of catalysts and precursor gases/pressures to enable the as yet elusive effective control of the crystalline structure and number of layers of graphene using the minimum amounts of matter and energy.Keywords
This publication has 50 references indexed in Scilit:
- Edge Structural Stability and Kinetics of Graphene Chemical Vapor Deposition GrowthACS Nano, 2012
- Activation Energy Paths for Graphene Nucleation and Growth on CuACS Nano, 2012
- Lattice Mismatch Induced Nonlinear Growth of GrapheneJournal of the American Chemical Society, 2012
- The Role of Stable and Mobile Carbon Adspecies in Copper-Promoted Graphene GrowthThe Journal of Physical Chemistry C, 2012
- Growth Mechanism of Hexagonal-Shape Graphene Flakes with Zigzag EdgesACS Nano, 2011
- First-Principles Thermodynamics of Graphene Growth on Cu SurfacesThe Journal of Physical Chemistry C, 2011
- Formation of Carbon Clusters in the Initial Stage of Chemical Vapor Deposition Graphene Growth on Ni(111) SurfaceThe Journal of Physical Chemistry C, 2011
- Low-temperature synthesis of graphene on nickel foil by microwave plasma chemical vapor depositionApplied Physics Letters, 2011
- Novel Growth Mechanism of Epitaxial Graphene on MetalsNano Letters, 2011
- Electronic Confinement and Coherence in Patterned Epitaxial GrapheneScience, 2006