Freestanding graphene nanosheets and large-area/patterned graphene nanofilms from indium-catalyzed graphite

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We present a simple and convenient route to freestanding graphene nanosheets and large-area/patterned graphene nanofilms by thermal annealing of an indium (In) and graphite mixture. In particles mixed with graphite powder catalytically oxidize the graphite powder and produce carbon oxide gases. The carbon oxide gases are then catalytically graphitized to form graphene nanostructures on In. The morphologies of the graphene nanostructures can be controlled by the In geometry: vertically-standing graphene nanosheets are synthesized using In particles and a graphene nanofilm is grown on a thin In layer. In is then completely removed, and thus high-purity graphene is finally produced. The graphene nanosheets exhibited excellent field-emission performance due to high-density edges. In addition, the graphene nanofilms show electrical conductivities comparable to or better than that of reduced graphene oxide. Furthermore, a large-area or a patterned graphene nanofilm is synthesized using a uniform or a pre-patterned In layer, respectively
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2016-05
Language
English
Article Type
Article
Keywords

CHEMICAL-VAPOR-DEPOSITION; CARBON NANOSHEETS; LARGE-AREA; FIELD EMITTERS; FILMS; LAYER; OXIDE; TEMPERATURE; PERFORMANCE; GROWTH

Citation

RSC ADVANCES, v.6, no.50, pp.44788 - 44793

ISSN
2046-2069
DOI
10.1039/c6ra08526a
URI
http://hdl.handle.net/10203/209565
Appears in Collection
NE-Journal Papers(저널논문)
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