Gold nanoparticle-doped graphene nanosheets: sub-nanosized gold clusters nucleate and grow at the nitrogen-induced defects on graphene surfaces

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We report the theory and synthesis of sub-nanosized gold clusters on reduced graphene oxide (r-GOs). The Au sub-nanoclusters were found to be nucleated and grown at defects of the r-GOs, particularly on nitrogen-induced defects from density functional theory investigation. The resulting Au/r-GOs exhibit an improvement of bulk electrical conductivities and a reduced ratio of the intensity of the D band to that of the G band (I-D/I-G), compared to the r-GOs without Au nanoclusters. The unique decrease of the I-D/I-G was demonstrated to be related to the filling of subnano-sized Au clusters on the r-GOs, presumably owing to enhancing the flat geometry of the graphene nanosheets.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2012-02
Language
English
Article Type
Article
Keywords

AUGMENTED-WAVE METHOD; SHEETS; OXIDE; COMPOSITES

Citation

JOURNAL OF MATERIALS CHEMISTRY, v.22, no.15, pp.7130 - 7135

ISSN
0959-9428
DOI
10.1039/c2jm16195h
URI
http://hdl.handle.net/10203/97816
Appears in Collection
NT-Journal Papers(저널논문)
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