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The effect of gamma irradiation on few layered graphene materials

AuthorsAnsón Casaos, Alejandro ; Puértolas, J. Antonio; Pascual, F. Javier; Hernández-Ferrer, Javier; Castell, Pere; Benito, Ana M. ; Maser, Wolfgang K. ; Martínez Fernández de Landa, María Teresa
KeywordsGraphene oxide
Graphene nanoribbons
Reduced graphene oxide
Gamma rays
Carbon lattice defects
Issue Date21-Feb-2014
CitationApplied Surface Science 301: 264-72 (2014)
AbstractThe effect of -irradiation on the structure and composition of chemically synthesized few-layered graphene materials was studied. Fully oxidized graphene oxide and graphene nanoribbons, as well as their respective chemically post-reduced forms, were treated under -irradiation in an air-sealed environment. Three different irradiation doses of 60, 90 and 150 kGy were applied. Structure and composition of the irradiated materials were analyzed by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), Raman spectroscopy and Xray photoelectron spectroscopy (XPS). The XRD patterns were not affected by - irradiation, and small changes were observed in the FTIR and TGA results. However, significant modifications were detected by Raman spectroscopy and XPS, particularly in the Raman G/D band intensity ratios and in the C 1s XPS profiles. Comparatively, the changes in Raman and XPS spectra after -irradiation were even greater than those occurring during the chemical reduction of graphene oxides. Our results indicate that the graphene carbon lattice was strongly affected by -irradiation, but the materials experienced small variations in their oxygen content.
Description9 pages, 9 figures.-- Available online 21 February 2014
Publisher version (URL)http://dx.doi.org/10.1016/j.apsusc.2014.02.057
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