In the present study, ZnSe nanoparticles (NPs) have been successfully synthesized via a hydrothermal process. Sample characterization has been done using Powder X-ray diffraction, UV–Vis spectroscopy, and Field emission scanning electron microscopy. ZnSe NPs show significant optical absorption in the visible light range and the direct optical energy bandgap has been measured as 3.22 eV,... Read More

The variation of casting thickness and solute content may play a significant role to alter the microstructure, thus, mechanical, creep and other properties. Therefore, the present work aims on the microstructural modification in terms of the length scale of the constituent phases and microstructure homogeneity in differently cast rods (Ø=2 mm, 3mm, and 5 mm) and ingots of... Read More

High Temperature Superconductivity (HTSC) with Superconducting Critical Temperature (Tc) up to 56 K in Fe Pnictides/Chalcogenide compounds baffled the classical idea that magnetic ions like Fe destroy superconductivity. These Fe-superconductors appear to be better than Cu-oxide HTSCs for making superconducting wires, considering the easier fabricability for Fe-HTSCs, for magnet and other... Read More

Metal nano-clusters (NCs) exhibit unique and interesting thermodynamic behaviour as compared to single molecule as well as bulk materials. Classical Molecular Dynamics (MD) simulations with Modified Embedded Atom Method (MEAM) model has been carried out in order to study the melting phenomena of Silver (Ag) NCs. Two NCs consisting of 108 and 1372 Ag atoms are chosen. The melting point temperature... Read More

In this paper, we have studied the effect of 8 nm sized multi walled carbon nanotubes (MWCNT) on the barrier height (Ï•_b) of ITO coated glass/Malachite Green (MG) dye /Aluminium (Al) based organic device. Presence of 8 nm MWCNT reduces the metal-organic interfacial barrier height as it enhances the charge separation and relaxation process. We have used ITO coated glass as front electrode and... Read More

Electrical relaxation of xAg2S (1-x) (0.5S 0.5Te) chalcogenide glassy system has been studied in the frequency range from 42Hz to 5Mz and temperature range from 433K to 523K. Dielectric constant and dielectric loss exhibit frequency and temperature dependency. Attempts have been made to analyse dielectric relaxation data using Hunts Model. Activation energies estimated from permittivity and... Read More

Battery powered electric vehicles which can be considered as affordable for a common buyer suffer from severe range limitation and have a substantial charging time which are preventing such vehicles from competing with or replacing current internal combustion engine-based vehicles. An electric motor-propelled vehicle powered by a hydrogen fuel cell for generating electricity appears to be the... Read More

The living world faces serious threat from the water pollution caused by heavy metal contamination in water. Specially, long term exposure to heavy metals has been found to lead to severe health hazards. Costly methods of removal of heavy metals from waste water may be replaced by cheap bio-adsorbents which are obtained from nature and are effective in removing heavy metals from waste water. ... Read More