Hydrothermal synthesis of Cu0.45Mn0.55O2 nanowhiskers: Structural characterizations and optical properties

Abstract We report the hydrothermal-growth of 3D flower-like Cu0.45Mn0.55O2 nanowhiskers self-assembled by interconnecting single-crystalline nanosheets. FESEM analysis shows that the size of Cu0.45Mn0.55O2 nanowhiskers is in the range of 1–2 μm. Structural investigations reveal that the phase of Cu0.45Mn0.55O2 nanostructures is insensitive after exposure to electron beam irradiation. The novel photoluminescence spectra of the as-prepared nanograined Cu0.45Mn0.55O2 exhibit prominent emission bands located in green–violet spectral region. Ultraviolet–visible absorption spectrophotometry was used to determine the absorption behavior of Cu0.45Mn0.55O2 nanostructures and a direct optical band gap of 2.53 eV was acquired by the Davis–Mott model.