sp 2 / sp 3 bonding ratio dependence of the band-gap in graphene oxide
作者: Ebrahim AkbariIman AkbariMohammad Reza Ebrahimi
作者单位: 1Department of Physics, Sharif University of Technology
2Department of Physics, Yasuj University
刊名: The European Physical Journal B, 2019, Vol.92 (4), pp.1-6
来源数据库: Springer Journal
DOI: 10.1140/epjb/e2019-90675-y
关键词: Solid State and Materials
英文摘要: Abstract(#br)Although the band-gap in pure graphene is zero, the oxygenated graphene could have a considerable band-gap. The D/G peak intensity ratio is known as a measure of the size of sp 3 ∕ sp 2 domains in graphene oxide (GO) sheets and determines the band-gap in GO sheets. Characterization results showed that the photoluminescence (PL) spectra of GO suspensions has a peak at ~604 nm and also the I(D)/I(G) intensity ratio of GO suspensions is 1.73. After reduction, a redshift appeared at PL spectrum (at 650 nm) and the I(D)/I(G) intensity ratio decrease to 1.26. Our results showed that the band-gap in GO is related to the I(D)/I(G) intensity ratio of GO suspensions and offers a mechanism for measuring the band gap according to Raman spectra. Moreover, GO is fluorescent over a broad...
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影响因子:1.282 (2012)

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