Abstract
In this paper the gamma irradiation effect on graphene layers is investigated. A simple method of synthesis from a solid-source bilayer (SiC/Ni) precursor has been used for the production of graphene flakes, both single-layer and multilayer. Samples with graphene flakes on the Ni surface were subjected to gamma irradiation in vacuum and in air under ambient atmospheric conditions. After a dose of 36 kGy, a variety of new carbon structures were observed on the surface of multilayer graphene flakes. This paper summarizes our thorough studies of the special features of these new carbon formations, including our study of the initial film morphology using optical and electron scanning microscopy, micro-Raman spectroscopy, atomic force microscopy and Kelvin probe force microscopy.
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