Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 43, Issue 27, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/43/27/275402
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Funding
- KOSEF through CNNC at SKKU
- MOEST [R31-2008-000-10029-0]
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We describe the low-temperature thermal exfoliation of graphite oxide to obtain functionalized graphene sheets (FGSs). Graphite oxide, which is highly oxidized graphite produced by a modified Brodie method, is further exfoliated by a simple heat treatment at 270-275 degrees C under ambient Ar. The FGSs that are generated have fewer defects and less oxygen content than in commercial graphene sheets (GSs) prepared at high temperatures (>900 degrees C). X-ray photoelectron spectroscopy demonstrates a clear pi-plasmon peak in the FGSs of the type that is seen in precursor graphite, but not in commercial GSs. Thus, our FGSs exhibit high 2D crystallinity and minimal defects.
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