Structural, electrical, electronic and optical properties of melanin films M. Abbas, F. D’Amico, L. Morresi, N. Pinto, M. Ficcadenti, R. Natali, L. Ottaviano, M. Passacantando, M. Cuccioloni, M. Angeletti and R. Gunnella Eur. Phys. J. E, 28 3 (2009) 285-291 Published online: 03 February 2009 DOI: 10.1140/epje/i2008-10437-9