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The method for calculating the field-emission current from single carbon nanotubes in an external electric field, directed along the nanotube axis, has been presented. The method is based on a semi-classical approach implementing the sub-barrier tunneling. It has been shown that in case of the high-fields the current corresponds to the Fowler-Nordheim mechanism for field emission, and in the case of the low ones - has deviations related to the potential barrier behavior feature.
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The analysis of the current and future developments in the field of the power elements based on the ß-decay has been executed. The possible technologies of creation have been described and the calculations of the efficiency for produced by them power sources have been presented. The possibility of creating a self-charging supercapacitor based on CNTs using isotope Ni63 and C14 has been examined. The theoretical calculation, confirming the perspectives of selecting the fields of investigations, has been performed.
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A model of the nucleation thermodynamics, which takes into account the surface tension value, has been developed. The experiments on formation of the iron clusters formed during the process of ferrocene clusters pyrolysis at various temperatures have been conducted. Based on the theoretical and experimental data the methods for determining the temperature dependence of the surface tension of nano-dimensional clusters have been developed, and the influence of this parameter on the size distribution of clusters has been shown.
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The thermodynamics of the metal nanocluster formation has been developed. An expression for the distribution function of clusters by sizes depending on their production condition has been obtained. It has been shown that the surface tension plays an important role in the cluster formation. The surface tension coefficient value for the iron clusters at 950°C has been found.
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