Preparation and characterization of vanadium-doped nickel oxide nanostructure deposited by dip-coating techniqueF. Chharganeh kalangestani, M. Simiari and F. E. GhodsiEur. Phys. J. Plus, 136 5 (2021) 517DOI: https://doi.org/10.1140/epjp/s13360-021-01513-w