Fig. 3: Characterization of the PtOx NSs.
a X-ray diffraction (XRD) pattern of a film cast from the PtO2 NS colloid. b A typical transmission electron microscopy (TEM) image of a PtOx NS and the corresponding c selected-area electron diffraction pattern. d In-plane XRD pattern of a monolayer PtOx NS film on a Si substrate.
