Development of graphene layers by reduction of graphite fluoride C2F surface
JournalName :
Phys. Status Solidi B
PubDateYear :
2009
PubDateOther :
Volume :
246
Issue :
11-12
StartPage :
2545
EndPage :
2548
Keywords :
TOP_NanoStructDet;W_Experiment
Notes :
Abstract :
We studied a possibility of reduction of the surface of graphite fluoride obtained by fluorination of highly oriented pyrolytic
graphite (HOPG) by a gaseous mixture of BrF3 and Br2. X-ray diffraction (XRD) revealed a layered structure of the fluorinated product being a second-stage intercalate due to a presence of
bromine molecules between the fluorinated graphite layers. Scanning tunneling microscopy and spectroscopy showed that the ‘‘old’’ surface of graphite fluoride (exposed to the ambient
air) has the graphite-like structure, while the fresh cleaved surface is non-conductive. Therefore, the outer layers of graphite fluoride can be reduced by water present in the laboratory atmosphere. The sample was treated byH2Ovapor to
confirm that. The reduction was controlled by Raman spectroscopy using intensity of the 1360 and 1580 cm1 bands. The energy dependent photoelectron spectroscopy was used for estimation of thickness of the reduction layer, which was found, does not exceed 2–3 graphite layers. The obtained results indicate the possibility of synthesis of graphene layers on
dielectric fluorinated graphite matrix.
