Synthesis and Mechanism of Formation of Non-equilibrium Ag–Ni Nanotubes

1D material systems such as Ag–Ni, Ag–Co, Ag–Fe nanowires or nanotubes have tremendous potential for making devices that require the coexistence of electrically conducting and magnetic phases interfaces. The realization microstructures is very challenging essentially due to their high positive mixing enthalpies which makes it difficult achieve unique non-equilibrium microstructures. In present exploration, silver–nickel were synthesized by adopting electrodeposition technique. Detailed microstructural characterization was carried out using electron microscopy transmission microscopic examinations revealed microstructure nanotube consisted nearly spherical, Ag–Ni nanoparticles encapsulated in a Ni-rich amorphous matrix. exhibited two types structures. small-sized particles had single-phase crystal structure, whereas large-sized multiple twinned structure. Mechanism formation involved nucleation subsequent growth inside alumina template. Owing few grow larger decomposed into Ag-rich clusters eventually matured nanotube.