Theoretical investigation on the EPR parameters for VO2+ doped ZnO–CdS nanocomposites Quan-Shui Zhu, Ya-Dong Li, Bao-Jin Chen and Hua-Ming Zhang Eur. Phys. J. D, 74 1 (2020) 4 Published online: 09 January 2020 DOI: 10.1140/epjd/e2019-100312-4