Optical properties of mixed clusters: comparative study of Ni/Ag and Pt/Ag clusters E. Cottancin, M. Gaudry, M. Pellarin, J. Lermé, L. Arnaud, J. R. Huntzinger, J. L. Vialle, M. Treilleux, P. Mélinon, J.-L. Rousset and M. Broyer Eur. Phys. J. D, 24 1-3 (2003) 111-114 Published online: 03 July 2003 DOI: 10.1140/epjd/e2003-00156-y