RETRACTED: Green synthesis of Copper doped CeO2 for electromagnetic shieldingR. Munirathnam, H.C. Manjunatha, L. Seenappa, S. Veera Rethina Murugan, T. Ganesh and Muralidhara KEPJ Web Conf., 359 (2026) 01006DOI: https://doi.org/10.1051/epjconf/202635901006