Fig. 3

EDS spectra of a single icosahedral particle with corresponding FFT insert (a) and a single nanoprism with corresponding SAED insert (b). EDS displays evidence of a predominately gold sample indicated by the absence of a sulfur peak (2.307 keV). The FFT shows a spacing of 2.35 Å, consistent with [111] FCC gold. The SAED shows spacing of 1.424 and 2.5 Å, corresponding with crystal lattice spacing and forbidden reflections of gold