Enhanced ultraviolet-blue emission and Raman modes in ZnO:Cr2O3 composite nanoparticlesThangaraj Pandiyarajan, Mauro L. Baesso and Balasubramanian KarthikeyanEur. Phys. J. D, 68 2 (2014) 28DOI: https://doi.org/10.1140/epjd/e2013-40363-3