In Situ Raman Studies of Electrically Reduced Graphene Oxide and Its Field-Emission Properties

详细信息    查看全文

• 作者：Satyaprakash Sahoo ; Geetika Khurana ; Sujit K. Barik ; S. Dussan ; D. Barrionuevo ; Ram S. Katiyar
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：March 14, 2013
• 年：2013
• 卷：117
• 期：10
• 页码：5485-5491
• 全文大小：521K
• 年卷期：v.117,no.10(March 14, 2013)
• ISSN：1932-7455

文摘

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/渭m.