Jump to main content
Jump to site search

Issue 4, 2015
Previous Article Next Article

Graphene growth under Knudsen molecular flow on a confined catalytic metal coil

Author affiliations

Abstract

We have established a simple method for drastically improving the productivity of chemical vapor deposition in large-area graphene synthesis using a roll-stacked Ni coil as a catalyst. Our systematic investigation of the effects of a confined catalytic geometry has shown that the gas flow through interfacial gaps within the stack follows non-continuum fluid dynamics when the size of the gap decreases sufficiently, which enhances the dissolution of the carbon sources into the catalyst during synthesis. Quantitative criteria for graphene growth in the confined geometry are established through the introduction of the Knudsen number, Kn, which is the ratio of the mean-free-path of the gas molecules to the size of the gap. The criteria provided in this article for the synthesis of graphene in the confined geometry are expected to provide the foundations for the efficient mass production of large-area graphene. We also show that the evolution of the catalytic Ni surface in a stacked system results in larger grains in the (111) plane, and consequently in reproducible, uniform, and high-quality multi-layered graphene.

Graphical abstract: Graphene growth under Knudsen molecular flow on a confined catalytic metal coil

Back to tab navigation

Supplementary files

Publication details

The article was received on 22 Jul 2014, accepted on 28 Sep 2014 and first published on 29 Sep 2014


Article type: Paper
DOI: 10.1039/C4NR04153D
Author version
available:
Download author version (PDF)
Citation: Nanoscale, 2015,7, 1314-1324

  •   Request permissions

    Graphene growth under Knudsen molecular flow on a confined catalytic metal coil

    H. Bong, S. B. Jo, B. Kang, S. K. Lee, H. H. Kim, S. G. Lee and K. Cho, Nanoscale, 2015, 7, 1314
    DOI: 10.1039/C4NR04153D

Search articles by author

Spotlight

Advertisements