The main effect of the polarizable metal force field is that it allows transient partial charges to develop on the metal atoms, enhancing interactions with polar species at the interface. Two interesting questions are the degree of polarization, i.e., the magnitude of the excess partial charges, and also the depth of penetration of this polarization into the metal. To answer these questions, we calculated the excess charge density (as a function of z for the planar interfaces and r for the nanospheres). Note that the metal structure has been recentered at z = 0 or r = 0 to make a visible comparison between these systems. This data is shown in Fig. . When DR-EAM is utilized, the charges on the gold atoms in the layers closest to the surface respond to nearby solvent molecules.