Laser-induced alloying Au–Pd and Ag–Pd colloidal mixtures: the formation of dispersed Au/Pd and Ag/Pd nanoparticlesElectronic supplementary information (ESI) available: TEM images of the molar ratios 2∶1 for both Au–Pd and Ag–Pd colloids. See http://www.rsc.org/suppdata/jm/b2/b200587e/.