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

摘要

A wet-chemical method to synthesize CuO nanocubes (0D), nanorods (1D) and nanosheets (2D) is demonstrated with using Cu(OAc)2 as an inorganic precursor and triethylammine as a basic source in the presence of tetraoctylammonium bromide in a H_2O-C_2H_5OH mixed-solvent. We found that the nanocubes spontaneously self-assembled into nanorods that could further self-assemble into nanosheets via oriented attachment of the nanorods. Based on the structural characterization, we found that the CuO nanosheets grow primarily along the [0 1 0] direction. A single phase of CuO nanostructures was observed. Another simple thermal decomposition method was also developed to prepare monodispersed single crystalline CuO nanocubes controlled by the decomposition of the inorganic Cu(OAc)_2 precursor with triethylammine and TOAB in H_2O-C_2H _5OH solution on a Si wafer and indium tin oxide conducting glass. The composition of the CuO was further confirmed by XRD and XPS analyses.