CUED Publications database

In situ characterization of alloy catalysts for low-temperature graphene growth.

Weatherup, RS and Bayer, BC and Blume, R and Ducati, C and Baehtz, C and Schlögl, R and Hofmann, S (2011) In situ characterization of alloy catalysts for low-temperature graphene growth. Nano Lett, 11. pp. 4154-4160.

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Abstract

Low-temperature (∼450 °C), scalable chemical vapor deposition of predominantly monolayer (74%) graphene films with an average D/G peak ratio of 0.24 and domain sizes in excess of 220 μm(2) is demonstrated via the design of alloy catalysts. The admixture of Au to polycrystalline Ni allows a controlled decrease in graphene nucleation density, highlighting the role of step edges. In situ, time-, and depth-resolved X-ray photoelectron spectroscopy and X-ray diffraction reveal the role of subsurface C species and allow a coherent model for graphene formation to be devised.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:23
Last Modified: 20 Nov 2014 19:00
DOI: 10.1021/nl202036y