Controlled morphologies of copper oxide single crystalline nanostructures by wet chemistry and thermal decomposition processes

► We report a wet-chemical method to synthesize CuO nanocubes (0D), nanorods (1D) and nanosheets (2D). ► We found that the nanocubes spontaneously self-assembled into nanorods which could further self-assemble into nanosheets via oriented attachment of nanorods. ► Another simple thermal decomposition method was also developed to prepare monodispersed single crystalline CuO nanocubes.