Figure 3
From: Morphological control of heterostructured nanowires synthesized by sol-flame method
Effects of cobalt salt precursor on the morphology of Co 3 O 4 on CuO NWs. A shell of Co3O4 is formed when cobalt nitrate is used as the cobalt salt precursor. (a) SEM image of CuO/Co3O4 core/shell NWs. The inset shows a single CuO/Co3O4 core/shell NW. (b) TEM image, (c) TEM-EDS spectrum, and (d) HRTEM of the CuO/Co3O4 core/shell NW edge, indicating that the shell is a 9-nm thick polycrystalline Co3O4 film.