NMR Study of Cobalt-Containing Nanowires of Various Types

Using the template synthesis method, nanowires (NWs) of various types are prepared from pure cobalt, an alloy of cobalt with copper, and layered structures comprised of alternating cobalt layers of various thicknesses and copper interlayers. Using the method of nuclear magnetic resonance (NMR) on 59Co nuclei, structural features of the arrays have been investigated. It is established that fcc and hcp Co phases are present in single-component NWs; the addition of copper ions to the electrolyte leads to almost complete disappearance of the hcp Co phase in the NW. Parameters that characterize the structure of interlayer boundaries of layered NWs with different layer thicknesses are determined.