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Nano Lett. 2008 Jan;8(1):36-41. Epub 2007 Dec 22.

Raman spectra of graphite oxide and functionalized graphene sheets.

Author information

1
Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA.

Abstract

We investigate Raman spectra of graphite oxide and functionalized graphene sheets with epoxy and hydroxyl groups and Stone-Wales and 5-8-5 defects by first-principles calculations to interpret our experimental results. Only the alternating pattern of single-double carbon bonds within the sp2 carbon ribbons provides a satisfactory explanation for the experimentally observed blue shift of the G band of the Raman spectra relative to graphite. To obtain these single-double bonds, it is necessary to have sp3 carbons on the edges of a zigzag carbon ribbon.

PMID:
18154315
DOI:
10.1021/nl071822y

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