Аңдатпа
Modifications of geometric characteristics and structural properties of Ni nanotubes obtained by template synthesis were considered in this research study. Ion-track polyethylene membranes with pores diameters in the range from 180 to 380 nm were used as templates. Methods of scanning and transmission electron microscopy, energy dispersive and X-ray analysis were used to find influence of the geometrical properties of templates on structure, phase and elemental composition. X-ray analysis showed polycrystalline FCC-structure of nanotubes with crystal lattice parameters different from the standard values, indicating the presence of microstresses in the structure and microdistortions of lattice. We have made a hypothesis of the effect of template parameters on the crystal structure. With the increase of pores diameter, a predominance tendency of traversal of NT axis growth to longitudinal appeared, which could be explained by the increase of the deposited atoms quality. In this case, a tangential crystallites growth dominates over the growth in the normal direction due to layer-by-layer growth process.