Figure shows SEM images of Au@AZO nanoparticles obtained by infusing the Au@Zn(OH)2 core@shell NPs in pH-neutralized solutions of 0 mM, 0.055 mM, 0.11 mM, and 0.23 mM Al(NO3)3, corresponding to nominal Al-dopings of 0, 1, 2, and 4 at.%, respectively. A uniform core@shell structure of the Au@AZO nanoparticles is visible up until a nominal doping percentage of 2 at.%, with 4 at.% doping leading to some loss of homogeneity of the AZO shell.