H. D. Dhaygude

Doping effect on SILAR synthesized crystalline nanostructured Cu-doped ZnO thin films grown on indium tin oxide (ITO) coated glass substrates and its characterization

In the present study, a novel chemical route is used to synthesize the undoped and Cu-doped ZnO thin films in aqueous solution by successive ionic layer adsorption and reaction (SILAR) method. The synthesized thin films are characterized by x-ray diffractometer (XRD), field emission scanning electron microscopy (FE-SEM), energy dispersive x-ray analysis (EDAX), contact angle goniometer and UV–Vis spectroscopic techniques. XRD study shows that the prepared films are polycrystalline in nature with hexagonal crystal structure. The change in morphology for different doping is observed in the studies of FE-SEM. EDAX spectrum shows that the thin films consist of zinc, copper and oxygen elements. Contact angle goniometer is used to measure the contact angle between a liquid and a solid interface and after detection, the nature of the films is initiated from hydrophobic to hydrophilic. The optical band gap energy for direct allowed transition ranging between 1.60–2.91 eV is observed.

Morphological development of CdSe0.6Te0.4 nanostructures by simple preparative parameters in electrochemical method and their subsequent influence on photoelectrochemical cell

Cadmium seleno–telluride (CdSe0.6Te0.4) ternary thin films were deposited on the stainless steel and fluorine doped tin oxide glass substrates using galvanostatic mode at different bath concentrations of CdSO4. CdSe0.6Te0.4 thin films were characterized using X-ray diffraction (XRD), UV–Vis spectroscopy, and field emission scanning electron microscopy (FE-SEM), and contact angle measurements. XRD patterns revealed the formation of the crystalline CdSe0.6Te0.4 nanomaterial’s having hexagonal crystal structure. FE-SEM micrographs show the formation of different kind of nanostructure morphologies, such as nanoparticle-like, nanonest-like, and nanoflower. The optical study suggests range of variation in the band gap of CdSe0.6Te0.4 thin films. The electrochemical performance for the interconnected nanoparticle and nanonest, nanoflowers of the CdSe0.6Te0.4 electrode were found to be, about 0.61, 0.81 and 0.54%, respectively.

Effect of Mn:(CuO/Cu(OH)2) Electrodes for Supercapacitors Application

In the present study, we report structural and electrochemical properties of Mn:(CuO/Cu(OH) 2 ) electrodes were investigable made-up on stainless steel via surfactant-free and inexpensive successive ionic layer adsorption and reaction (SILAR) method. Further, these CuO(CuOH) 2 and 3% Mn:CuO(CuOH) 2 electrodes exhibits outstanding surface properties like uniform growth on surface, high surface area and uniform pore size distribution of pure and doped CuO samples. The electrochemical properties of pure and 3% Mn doped (CuO(CuOH) 2 ) nanostructure have been investigated by cyclic voltammetry, charge discharge. The electrochemical studies of the pure and 3% Mn doped (CuO(CuOH) 2 ) samples show evident influence of surface properties on the pseudo capacitance performance. The maximum specific capacitances of nanoflowers like CuO electrodes are found to be 597 Fg −1 , respectively at 5 mV s −1 scan rate. Present investigation suggests the inexpensive SILAR move toward for fine modification surface properties of 3% Mn:(CuO(CuOH) 2 ) materials for energy storage applications.