Enhancement of both optical and catalytic activity of copper-decorated porous silicon micro-particlesAbderrahmane Hamdi, Chohdi Amri, Rachid Ouertani, Elhadj Dogheche and Hatem EzzaouiaEur. Phys. J. Appl. Phys., 93 3 (2021) 30402DOI: https://doi.org/10.1051/epjap/2021200380