Figure 6: High-resolution imaging of Ag–Pd nanocages.

(a,b) High-resolution BF-STEM and HAADF–STEM images of a representative hollow cage Ag–Pd nanoparticle (inset: FFT of the entire nanocage, Fig. 5b). h, hole in the nanoparticle surface. Scale bar, 5 nm. (c) Higher magnification of the square area marked in a. Scale bar, 5 nm.