Abstract:
A method of application of the nuclear magnetic resonance method to determine the structure of nanowires with the composition Co$_{80}$Cu$_{20}$ is proposed. Nanowires prepared using templat matrices by electrolytic deposition have been studied. The pore thickness is 10 $\mu$m and the pore diameter is 100 nm. The structure of homogeneous copper and cobalt nanowires was determined by analysing nuclear magnetic resonance data on $^{59}$Co in the local field and three-dimensional modelling. Based on the analysis of nuclear magnetic resonance spectra, information about the distribution of hyperfine fields in the investigated nanowires, as well as on the number of cobalt atoms with different types of nearest-neighbour environment was obtained. Based on the data on the number of cobalt atoms in the coordination of which copper atoms are absent, it is established that in these nanowires the crystalline structure of FCC type is realised. Earlier, evaluation and comparison of the intensity of resonance lines showed that clusters with agglomeration of about 30 atoms are formed in the volume of cobalt. Three-dimensional modelling allowed us to clarify the shape of these clusters.Three-dimensional modelling allowed us to clarify the shape of these clusters. On the basis of the analysis of nuclear magnetic resonance spectra and three-dimensional modelling, taking into account the composition of nanowires, conclusions about the structure of homogeneous cobalt-containing nanowires were made.
Keywords:nanowires, nuclear magnetic resonance, modelling, clusters.
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