Optical and structural properties of Zn0.94Cu0.04Cr0.02O nanoparticles by two-step annealing. International Journal of Advance Engineering and Research Development (IJAERD), [S. l.], v. 5, n. 19, p. -, 2022. Disponível em: https://ijaerd.org/index.php/IJAERD/article/view/6442. Acesso em: 8 sep. 2025.