Fig. 1. (a) FESEM images of MoO3 sea urchins on a Si substrate synthesized by chemical bath deposition, (b) magnified image of a single MoO3 sea urchin; inset shows the EDS spectra and (c) EDS composite map of Mo L (red) and O K (green) levels from a single sea urchin. Yellow colour is seen due to the overlap of green and red in the same region (see Fig. S3†).
