Regenerative synthesis of copper nanoparticles by photoirradiationN. Nishida, A. Miyashita, N. Hashimoto, H. Murayama and H. TanakaEur. Phys. J. D, 63 2 (2011) 307-310DOI: https://doi.org/10.1140/epjd/e2011-10515-8