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Metal-catalyzed crystallization of amorphous carbon to graphene
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10.1063/1.3318263
/content/aip/journal/apl/96/6/10.1063/1.3318263
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/6/10.1063/1.3318263
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

The process schematics for the metal-catalyzed crystallization of a-C to graphene by thermal annealing.

Image of FIG. 2.
FIG. 2.

Raman spectra of (a) a-C (40 nm) and (b) the resulting graphene layer after Ni-catalyzed crystallization (Ni thickness ). Excitation laser wavelength was 632.8 nm.

Image of FIG. 3.
FIG. 3.

Raman spectra showing quality vs temperature dependence for (a) nickel catalyst and (b) cobalt catalyst. Graphene can form within a range of temperatures, although appears to be optimal. Insets show representative optical images after annealing at 750 and , showing relatively uniform surface coverage. The thickness of the initial a-C layer was 40 nm.

Image of FIG. 4.
FIG. 4.

(a) AFM image of a transferred graphene sheet on a substrate. (b) Graphene (and graphite) thickness vs initial a-C thickness. Samples were annealed at for 15 min with a 300 nm Ni catalyst layer.

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/content/aip/journal/apl/96/6/10.1063/1.3318263
2010-02-12
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Metal-catalyzed crystallization of amorphous carbon to graphene
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/6/10.1063/1.3318263
10.1063/1.3318263
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