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Patil J.S.,K.B.P. Mahavidyalaya | Dhasade S.S.,Vidnyan Mahavidyalaya | Rath M.C.,Bhabha Atomic Research Center | Thombare J.V.,Shivaji University | Fulari V.J.,Shivaji University
Materials Science in Semiconductor Processing | Year: 2014

In this work we employed an electron irradiation technique to prepare zinc sulfide nanoflakes with various dimensions by irradiating electrodeposited thin films. This study reports the effect of irradiation of 2 MeV electron beam on the crystal structure, surface morphology, optical properties and photosensitive properties of zinc sulfide thin films. The electron beam irradiated films were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) and the ultraviolet-visible (UV-vis). Upon electron beam irradiation, the band gap energy of zinc sulfide decreases from 3.61 to 3.31 eV along with an increase in the crystal size form 47-78 nm. The fluence of the electron beam was 2×1013 electrons/2 μs cm2. The crystal size was found to increase upon electron beam irradiation and materials exhibit better crystallization. Similar results were also observed in the X-ray diffraction studies, where peak intensity increased upon electron beam irradiation. © 2014 Elsevier Ltd. Source


Abhange P.B.,Raje Ramrao Mahavidyalaya | Malvade V.C.,Raje Ramrao Mahavidyalaya | Chandralingam S.,Jawaharlal Nehru Technological University | Thombare J.V.,Vidnyan Mahavidyalaya | Kokare S.R.,Raje Ramrao Mahavidyalaya
Materials Letters | Year: 2016

The BaNd1.96La0.04Ti3O10 (La-BNT) sample was prepared by solid state reaction method. The prepared sample was characterized by different techniques. The structural study was carried out by X-ray diffraction (XRD) technique. The morphological study is carried out by scanning electron microscopy (SEM) technique. The surface morphological study showed that the La-BNT hexagonal bricks are randomly oriented. The electrical study of La-BNT pellet was made with the help of resistivity measurement and impedance analysis. The resistivity plot showed that sample is in highly resistive state. The resistivity study showed that thermally induced mobility of the charge carriers may develop in La-BNT pellet. The activation energy Ea was obtained from the DC resistivity data and it was found that 0.47 eV which shows n-type semiconductor. © 2016 Elsevier B.V. All rights reserved. Source


Dhasade S.S.,Vidnyan Mahavidyalaya | Patil J.S.,K.B.P. Mahavidyalaya | Kim J.H.,Chonnam National University | Han S.H.,Hanyang University | And 2 more authors.
Materials Chemistry and Physics | Year: 2012

CuS thin films were deposited on stainless steel substrates from an aqueous solution of CuSO 4, Na 2S 2O 3 and Triethanolamine. Deposited films were characterized by XRD, SEM, EDAX, Raman and Optical measurements. The electrodeposition bath concentration can be used to control the diameter of the electrodeposited nanorods within the range of 35-40 nm. The formation of complexes of copper ions and TEA was found to be a key factor in the nanorods growth process. Films are polycrystalline with hexagonal crystal structure. SEM images indicate that the film surfaces are smooth, homogeneous and well-covered. A new structure of CuS nanorods having length of 5-10 μm and diameter from 35 to 40 nm has been demonstrated. By changing bath concentration and keeping deposition time fixed the agglomeration of rods is enhanced due to the formation of large number of particles during growth process. Raman shifts of samples are detected at wave numbers 473 cm -1. Typical film deposited with optimized bath concentration shows optical band gap of about 2.73 eV. © 2012 Elsevier B.V. All rights reserved. Source


Dhasade S.S.,Vidnyan Mahavidyalaya | Thombare J.V.,Vidnyan Mahavidyalaya | Gaikwad R.S.,Vidnyan Mahavidyalaya
Materials Science in Semiconductor Processing | Year: 2015

In this work we employed an electrodeposition technique to prepare copper selenide nanorods with various dimensions by changing bath concentration and keeping deposition time fixed. This study reports the effect of bath concentration on the crystal structure, surface morphology and optical properties of copper selenide thin films. The electrodeposited films were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectra properties, the ultraviolet-visible (UV-vis) and compositional analysis. Upon bath concentration, the band gap energy of copper selenide decreases from 2.54 eV to 2.35 eV along with an increase in the crystal size form 7-17 nm. The crystal size was found to increase upon increase in bath concentration and materials exhibit better crystallization. Similar results were also observed in the XRD studies, where peak intensity increased upon bath concentration. © 2014 Elsevier Ltd. All rights reserved. Source


Dhasade S.S.,Vidnyan Mahavidyalaya | Patil S.,Vidnyan Mahavidyalaya | Kale B.B.,C MET | Han S.H.,Hanyang University | And 2 more authors.
Materials Letters | Year: 2013

Copper sulfide hollow spheres were formed by irradiating thin films with 7 MeV electron beam. The electron beam irradiated films were characterized using X-ray diffraction, scanning electron microscopy and UV-vis absorption techniques. During electron beam irradiation, the process of formation of the CuS nanoparticles appeared to be initiated by an electron fluence of 2×1013 electrons cm-2 that further depends on the dose rate. X-ray diffraction measurements reveal that the crystal size decreases from 12 nm to 5 nm with an electron dose of 50 kGy. This signifies that there is a drastic change in morphology and crystallinity with electron beam irradiation. The change in morphology and crystallinity is due to increased surface temperature with electron dose. © 2012 Elsevier B.V. Source

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