Radiation modification of graphene structures and study of physical and mechanical properties of composites based on it
Keywords:
graphene, radiation modification, composite materials, defects, electron irradiation, Raman spectroscopyAbstract
During the application of graphene in a variety of devices there is a possibility of its irradiation by electrons or ions, for example, in the area of space technology, when a certain conditions can lead to changes in its properties. Furthermore, in some cases, irradiation can be used as a technological tool of modification of graphene properties. Therefore, the investigation of possible radiation effects in these such structures becomes a subject of great importance. The results of irradiation of graphene and a three-layer graphene in a scanning electron microscope by energy of 15 keV are presented. Raman spectroscopy data of FLG show structural changes caused by exposure to the electron beam. Raman spectra are characterized by a distinct developed additional peaks D and D', which indicate the formation of a certain type of defects. In the course of various experiments on graphene structures it was found that under the irradiation by the electron beam in particular in the SEM, the formation of bridge-like defects in the structure of the few-layer graphene is possible. Bridge-like defects prevent sliding between the layers of graphene, which opens wide possibilities of the application of these carbon nanostructures. In addition in this paper we present the results of experimental studies of physical and mechanical properties of composite materials based on polymers with fillers of graphite nanopowder.
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