Hydrothermal synthesis of 3D Cu0.45Mn0.55O2 nanostructures; lattice vibrations and novel photoluminescence properties

In this paper, Novel 3D Cu_0.45Mn_0.55O₂ nanoarchitectures self-assembled by interconnecting densely stacked nanosheets have been successfully synthesized by facile hydrothermal growth method. The crystalline phase, morphology, particle size and component of the as-prepared nanomaterial were characterized by X-ray diffraction, field-emission scanning electron microscopy (FESEM) with energy-dispersive X-ray spectroscopy and Raman spectroscopy. FESEM analysis shows that the size of 3D Cu_0.45Mn_0.55O₂ nanostructures is in the range of 1–1.5 μm, and the thickness of interconnected nanosheets is about 45 nm on the average. The structural features of as-synthesized Cu_0.45Mn_0.55O₂ nanostructures are studied to analyze the near-neighbor environment of oxygen coordination around manganese and copper cations reported for the first time using Raman scattering spectroscopy. Moreover, the novel photoluminescence spectra of the as-prepared Cu_0.45Mn_0.55O₂ nanostructures are reported exhibiting prominent emission bands located in red-violet spectral region.