Figure 1
From: Morphological control of heterostructured nanowires synthesized by sol-flame method
Effects of solvent on the morphology of Co 3 O 4 on CuO NWs. Schematic drawing of the sol-flame method (a), for which bare CuO NWs (b) are dip-coated with a cobalt precursor containing cobalt salt and solvent and air dried (c), followed by a rapid flame annealing process to form Co3O4-decorated CuO NW heterostructure. SEM image of Co3O4-decorated CuO NWs prepared by the sol-flame method with different air-drying conditions: 25°C for 0.4 h (d), 25°C for 22 h (e), 130°C for 1.5 h (f), and first dried at 130°C for 1.5 h, then reapplied acetic acid and dried at 25°C for 0.4 h (g). Extensive drying by increasing duration or temperature inhibits the formation of the Co3O4 NP-chain morphology.