Abstract
Novel flower-like hierarchical nanostructures consisting of MgxZn1-xO semiconductors were successfully synthesized by the hydrothermal technique. X-ray diffrac- tion results indicate that the MgxZn1-x O( x = 0-0.25 at %) samples are single hexagonal phase. The grain morphology and spatial compositions of MgxZn1-xO nanoflowers were systematically observed by field-emission scanning electron microscopy, transmission electron microscopy, and energy- dispersive X-ray analysis. The UV-Visible absorption spectra show that the band gap of MgxZn1-xO nanoflowers can be readily tuned by optimizing the molar ratio of Mg precursors. The photoluminescence line shapes of the Mgx Zn1-xO samples of Mg composition ranging from 0 up to 0.25 at % were found to exhibit the inherent doping broad- ening, which masks the excitonic emissions. These nanos- tructures may be used for various optoelectronic nanodevices owing to its low cost and easy scaling up. Graphical Abstract
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