Effect of Annealing Temperatures on the Color Properties of Copper Oxide Films Prepared by the Sol-Gel Technique. Iraqi Journal of Applied Physics, [S. l.], v. 20, n. 2B, 2026. DOI: 10.2025/sb37q168. Disponível em: https://ijap-iq.com/index.php/ijap/article/view/9. Acesso em: 25 jun. 2026.