Physicochemical and nanomedicine applications of phyto-reduced erbium oxide (Er2O3) nanoparticles oleh Hamza Elsayed Ahmad Mohamed, Ali Talha Khalil, Khaoula Hkiri, Muhammad Ayaz, Jamil Anwar Abbasi, Abdul Sadiq, Farhat Ullah, Asif Nawaz, Ikram Ullah, Malik Maaza