Multifunctional radioactive ZnO/NiFe2O4 nanocomposite for theranostic applications Amira S. Hamed, I. A. Ali, M. El Ghazaly, H. E. Hassan and M. Al-Abyad Eur. Phys. J. Plus, 136 11 (2021) 1118 Published online: 08 November 2021 DOI: 10.1140/epjp/s13360-021-02066-8