Experimental and DFT studies of copper nanoparticles as SERS substrates

J. D. Amador-Martínez, N. S. Flores-López, A. R. Hernandez-Martínez, G. Calderón-Ayala, J. Bocarando-Chacon, N. Cayetano-Castro, F. Martínez-Suarez, J. E. Leal-Pérez, M. Cortez-Valadez, R. Britto Hurtado