In this work, a complex experimental study of the effect of electron and proton ionizing radiation on the properties of carbon nanowalls (CNWs) is carried out using various state-of-the-art materials characterization techniques. CNW layers on quartz substrates were exposed to 5 MeV electron and 1.8 MeV proton irradiation with accumulated fluences of 7 × 1013 e/cm2 and 1012 p/cm2, respectively. It is found that depending on the type of irradiation (electron or proton), the morphology and structural properties of CNWs change; in particular, the wall density decreases, and the sp2 hybridization component increases. The morphological and structural changes in turn lead to changes in the electronic, optical, and electrical characteristics of the material, in particular, change in the work function, improvement in optical transmission, an increase in the surface resistance, and a decrease in the specific conductivity of the CNW films. Lastly, this study highlights the potential of CNWs as nanostructured functional materials for novel high-performance radiation-resistant electronic and optoelectronic devices.
A systematic study of the synthesis of hybrid composite materials based on synthetic (poly-N-vinylpyrrolidone) and natural (agar-agar) macromolecules in the presence of plasticizers (PEG-400, glycerin) and mineral filler bentonite has been performed by the method of electron irradiation. The methods of X-ray diffraction analysis and SEM showed that the structure of the resulted hybrid compositions is defined as an interpenetrating network with the distributed intercalated particles of mineral component inside its volume. It has been established that mechanical properties of the hybrid composition are determined mainly by the struc-tural organization of the interpenetrating polymer network, formed during electron irradiation of the initial polymer mixture in the presence of plasticizers, as well as by the conditions for intercalation of polymer seg-ments into the interpacket layers of the mineral matrix. During the process of crazing of the sample under ten-sion the shear stress is concentrated in the central part of the sample from the periphery of the fastening. It is shown that the degree of swelling for hybrid composition strongly depends on concentration of a low molecu-lar plasticizer in the polymeric interpenetrating network, which can easily impregnate into the interplanar lay-ers of bentonite.
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