Fig. 2. (a) HRTEM image of a Ag@Pt core/shell nanoplate at its edge. (b) ED pattern taken from a single nanoplate. Black and white arrows indicate the diffractions from Ag and Pt, respectively. (c) XRD patterns of the Ag nanoplates and the Ag@Pt core/shell nanoplates. Standard positions for Ag and Pt are indicated by dashed lines. (d) Evolution of the UV-vis spectroscopy during the epitaxial growth of Pt on the Ag nanoplates. Inset: digital photographs of the Ag nanoplates before and after the growth of Pt.