title: Diameter-controlled synthesis of α-Mn2O3 nanorods and nanowires with enhanced surface morphology and optical properties.
abstract: Single crystalline α-Mn(2)O(3) nanorods, and nanowires with and without nanoparticles on them have been successfully synthesized by a template-free hydrothermal route. The variation in hydrothermal temperature has not only affected the diameter of the nanostructure but also noticeably affected the morphology and optical properties of the α-Mn(2)O(3) nanostructure. The influence of temperature on the diameter, crystallinity, surface morphology and optical properties of the α-Mn(2)O(3) nanostructure have been characterized by x-ray diffraction, scanning electron microscopy, energy dispersive x-ray analysis, transmission electron microscopy, high resolution transmission electron microscopy, Raman spectroscopy and UV-visible spectroscopy and photoluminescent (PL) spectroscopy. The results showed in our experimental conditions that single crystalline nanorods of the α-Mn(2)O(3) were obtained at a temperature of 180 °C, while single crystalline nanowires were obtained by increasing the temperature to 240 and 300 °C. Nanowires with nanoparticles on them were obtained by increasing the temperature to 240 °C and nanowires without nanoparticles on them were obtained by increasing the temperature to 300 °C. The nanorods and nanowires obtained had a well-defined morphology. The nanowires synthesized at 300 °C exhibited an intense orange band PL spectrum.
authors.affiliation: Department of Physics, School of Applied Sciences, University of Science and Technology Beijing, Beijing 100083, People's Republic of China.
authors.forename: Q
authors.initials: Q
authors.lastname: Javed
authors.forename: F P
authors.initials: FP
authors.lastname: Wang
authors.forename: M Y
authors.initials: MY
authors.lastname: Rafique
authors.forename: A M
authors.initials: AM
authors.lastname: Toufiq
authors.forename: Q S
authors.initials: QS
authors.lastname: Li
authors.forename: H
authors.initials: H
authors.lastname: Mahmood
authors.forename: W
authors.initials: W
authors.lastname: Khan