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We report on the observation of broad photoluminescence wavelength tunability from n-type gallium nitride nanoparticles (GaN NPs) fabricated using the ultraviolet metal-assisted electroless etching method. Transmission and scanning electron microscopy measurements performed on the nanoparticles revealed large size dispersion ranging from 10 to 100 nm.(More)
Polycrystalline Er<sub>x</sub>Sc<sub>2-x</sub>Si<sub>2</sub>O<sub>7</sub> compounds were fabricated using RF-sputtering by alternating Er<sub>2</sub>O<sub>3</sub>, Sc<sub>2</sub>O<sub>3</sub> layers separated by SiO<sub>2</sub> layer. This new compounds presents excitation cross section at 980nm around 1.39&#x00D7;10<sup>-21</sup>cm<sup>2</sup> with(More)
Polycrystalline Er-Sc silicates (Er x Sc2-x Si2O7 and Er x Sc2-x SiO5) were fabricated using multilayer nanostructured films of Er2O3/SiO2/Sc2O3 deposited on SiO2/Si substrates by RF sputtering and thermal annealing at high temperature. The films were characterized by synchrotron radiation grazing incidence X-ray diffraction, cross-sectional transmission(More)
The distribution, abundance, ecology, and diversity of macro-zoobenthos in Lidder stream, a major tributary of the river Jhelum of Kashmir Himalaya was investigated for one year. The study was carried at three zones (upstream, midstream and downstream) of varied topography and physical characteristics. The habitat of each zone was determined with respect to(More)
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