On the other hand, the observed dependence of the photoluminescence spectrum on the excitation wavelengths can only be explained by intraband recombination within the conduction band and could not be aligned with simulations of interband luminescence. Thus, we attribute these observations to the presence of an efficient Auger scattering process that produces an excited charge distribution in the conduction band using the energy gained by the recombination of d -band holes. These results illustrate that the choice of the excitation wavelength alone is not sufficient to fully determine the nature of the excitation process in metallic nanoparticles.