Formation, Charge Transfer, Structural and Morphological Characteristics of ZnO Fractal-Percolation Nanosystems
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Structural and morphological characteristics of ZnO nanosystems in the form of three-dimensional network-like systems have been investigated. Current–voltage (I–V) characteristics and charge transfer parameters of ZnO fractal-percolation nanosystems have been studied both in air and in vacuum at different temperatures and voltage sweep rates. The charge transfer characteristics show the presence of RαCiCαi chains in the nanosystems. The RC chains are formed because the Debye screening length has the same order of magnitude as the local values of ZnO nanowires radii. Gas-sensing tests based on I–V characteristics investigation have shown a possibility of distinguishing between reducing gases such as CH4 or C2H5OH.
KeywordsZnO nanowires gas sensor current–voltage characteristics charge transfer reducing gas
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This work was supported by the Ukranian Ministry of Science and Education within the research Grant “Mechanisms of universal sensors formation on the basis of anisotropic heterojunctions ZnO/Cu2O(CuO) in the form of neural networks nanosystems”; project number 0116U002620.
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