What is it about?

In the present study, we applied a sonication based method to achieve graphene oxide (GO) and reduced graphene oxide (r-GO) nano-structures. X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), Transmission electron microscopy (TEM) and X-ray absorption near edge structure (XANES) spectroscopy measurements were applied to characterize the samples. XRD, TEM and Raman results demonstrate significant crystalline nature of GO nano sheets.

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Why is it important?

On the other hand, the r-GO sample shows poor crystallinity with a large number of lattice defects. The FTIR spectrum conveys the attachment of significant oxygen-containing functional groups in GO sample. The detachment of oxygen function groups from the r-GO sample, under the reduction process, is also confirmed by the FTIR spectra.


Local electronic structure investigations, from the C K-edge XANES of GO and r-GO nano sheets, convey the lowering of 1s→π* and 1s→σ* transitions and lesser sp2 character of the carbon ring. The O K-edge XANES spectra have shown the accumulation of C=O σ*, C-O σ* and O-H σ* states at the basal plane of GO and elimination of such functional groups in the r-GO samples and convey controlled tailoring of the functionalities of GO and r-GO nano sheets.

Dr. Sitansu Sekhar Nanda
Myongji University

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This page is a summary of: Structural and electronic structure investigations on sonication based synthesized graphene oxide and reduced-graphene oxide nano-sheets, Physica Scripta, August 2019, Institute of Physics Publishing,
DOI: 10.1088/1402-4896/ab3868.
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