Document Detail


Growth of adlayer graphene on Cu studied by carbon isotope-labeling.
MedLine Citation:
PMID:  23278710     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The growth of bilayer and multilayer graphene on copper foils was studied by isotopic labeling of the methane precursor. Isotope-labeled graphene films were characterized with micro-Raman mapping and Time-of-Flight Secondary Ion Mass Spectrometry (TOF SIMS). During growth at high temperature the adlayers formed simultaneously and beneath the top, continuous layer of graphene and the Cu substrate; the adlayers share the same nucleation center and all adlayers nucleating in one place have the same edge termination. These results suggest that adlayer growth proceeds by catalytic decomposition of methane (or CHx, x<4) trapped in a "nano-CVD" chamber between the first layer and the substrate. Based on these results, submillimeter bilayer graphene was synthesized by applying a much lower growth rate.
Authors:
Qiongyu Li; Harry Chou; Jin-Hui Zhong; Jun-Yang Liu; Andrei Dolocan; Junyan Zhang; Yinghui Zhou; Rodney S Ruoff; Shanshan Chen; Weiwei Cai
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-2
Journal Detail:
Title:  Nano letters     Volume:  -     ISSN:  1530-6992     ISO Abbreviation:  Nano Lett.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-2     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088070     Medline TA:  Nano Lett     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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