Theoretical study of germanium nanoclusters: significance of surface passivationShanawer Niaz, Oǧuz Gülseren, Safdar Hussain, M. Anwar-ul-Haq, Manzoor Ahmad Badar and Muhammad Aslam KhanEur. Phys. J. Plus, 137 3 (2022) 316DOI: https://doi.org/10.1140/epjp/s13360-022-02502-3