Dipali S. Patil

Improved electrochemical performance of sandwich-like silver nanowires/graphene oxide nanostructure

AbstractThis paper demonstrates the fabrication of silver nanowires (AgNWs)/graphene oxide stacking structure for enhanced electrochemical performance. In this sandwich-type structure, the stratum of Ag nanowires acts as a highway bridge between the two layers of graphene oxide, where electrons can be transferred easily through this stacked network. The GO-AgNWs showed a specific capacitance of 251xa0Fg−1 at 10xa0mVxa0s−1 and an energy density of 34.05xa0Whxa0kg−1 at 0.1xa0mA, indicating the positive synergistic effect of AgNW and GO. The obtained electrochemical characteristics are encouraging and found to be mainly attributed to an effective combination of graphene oxide and AgNWs.Graphical AbstractFigure shows the steps involved in the development of the sandwich-like AgNW/GO nanostructure electrode.n

Investigations on chemosynthesized CdSe microclusters

CdSe microclusters have been synthesized by a simple and cost-effective Chemical Bath Deposition method onto soda-lime glass substrates. In order to study the annealing effect on CdSe thin films as deposited films were air annealed at temperatures 100, 200, 300 and 400 °C respectively for 1 hour. These films are characterized for their optical, structural, morphological properties using UV-VIS spectrophotometer, X-ray Diffraction and Field Emission Scanning Electron Microscopy techniques. The optical band gap energy is found to decrease from 1.76 to 1.21 eV exhibiting a red shift. XRD pattern shows the formation of amorphous CdSe for as deposited thin films. Annealing effect leads to the transition of crystal structure from amorphous to cubic and cubic to stable hexagonal which is clearly evidenced from XRD. FESEM images show formation of microclusetrs which on air annealing at 400 °C further composed of bunch of nanoclusters within the microclusters with improvement in the crystallinity.

Hydrothermal synthesis of CdSe microspheres

Cadmium selenide (CdSe) microspheres have been synthesized by a cost-effective, simple and versatile hydrothermal deposition method onto soda-lime glass substrates. The thin films of CdSe microspheres were characterized for their optical absorbance/transmittance, optical band gap, photoluminescence and surface morphological study. CdSe microspheres show visible light absorbance of solar spectrum while is suffering from low optical transmittance. The optical band gap energy of CdSe microspheres was found to be 1.89 eV. Photoluminescence study involves one measure peak at 615 nm accompanying two more small peaks. The surface morphological study of CdSe thin film resembles a formation of microspheres which are interpenetrating with each other is seen at higher magnifications.