Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 117, Issue 10, Pages 5485-5491Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp400573w
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Funding
- DoE [DE-FG02-ER46526]
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Electric-field-dependent in situ Raman studies have been carried out on chemically prepared graphene oxide The Raman spectra show significant changes with increase in the applied electric field; in particular, the intensity of the G peak decreases with electric field. This behavior is typical for chemically or thermally reduced graphene oxide. To understand the nature of reduction, we compared the temperature-dependent and electric-field-dependent Raman spectra of graphene oxide and found that the evolutions of Raman spectra are not in agreement with each other, except the intensity of the G peak that decreases in both cases. The D peak broadens significantly with increase in temperature, whereas it sharpens in the case of applied electric field. The electron-field-emission properties of the electrically reduced graphene oxide were also carried out, and the turn-on field was found to be 9.1 V/mu m.
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