Figure 4
SEM images of platinum nanocrystals. The crystals are arranged in hexagonal patterns produced using 450-nm (a) and 150-nm (b) silica bead templates. Insets: top right corner, rendered particle; bottom right corners, digital zooms of actual cubooctahedral nanocrystals with clearly visible top 100 facets and four 111 facets on the sides. Distortion of hexagonal arrangement of nanocrystals in (b) is caused by the sample drift at high magnifications.