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Articles by R. John Bosco Balaguru
Total Records ( 4 ) for R. John Bosco Balaguru
  V. Manoj , M. Karthika , V.S.R. Praveen Kumar , S. Boomadevi , K. Jeyadheepan , R.K. Karn , R. John Bosco Balaguru and S.K. Pandiyan
  A new approach has been proposed to synthesis pure ZnO nanoparticles from zinc nitrate hexa-hydrate precursor and sodium carboxymethyl cellulose capping agent. The resulting nanoparticles were characterized by X-ray Diffraction (XRD), Fourier Transform Infra-red (FTIR) spectroscopy, photoluminescence spectroscopy and Field Emission Scanning Electron Microscopy (FESEM). The XRD results showed that particle size is in the range of few nanometers with hexagonal wurtzite structure. Photoluminescence and FESEM results suggested that the adopted method can be successfully utilized for the preparation of size controlled nanocrystalline ZnO powder.
  M. Karthika , V. Manoj , S. Boomadevi , K. Jeyadheepan , R.K. Karn , R. John Bosco Balaguru and S.K. Pandiyan
  Nano crystalline zinc oxide (ZnO) films were fabricated by dip coating of ZnO hydrogel. Zinc nitrate hexahydrate and sodium carboxymethyl cellulose were used to prepare the hydrogel. The dip coated samples were annealed at 400°C to obtain the high quality thin films. The films were characterized by X-Ray Diffraction (XRD) which indicated that the films are single phase with the wurtzite structure. Surface morphology of the nanoparticles were studied by Field Emission Secondary Electron Microscopy (FESEM) and optical properties were studied by photo luminescence spectroscopy. Further, gas sensing behaviour were checked for the coated films for ammonia and acetaldehyde vapours at room temperature.
  C.H.S.S. Pavan Kumar , R. John Bosco Balaguru and B.G. Jeyaprakash
  Cerium oxide is a multi-application material due to its wide band gap (3.6 eV) and lattice parameter matching similar to silicon. Its high dielectric constant, ionic conductivity and ferromagnetic nature makes to utilize as insulating layer in transistors, solid oxide fuel cells and spintronic application, respectively. In the present study, thin films of cerium oxide and Mn doped cerium oxide films have been prepared on glass substrates by homemade spray pyrolysis unit. X-ray diffraction pattern analysis shows peak broadening upon doping and indicates a decrease in grain size. The influence of Mn doping on electrical properties was also analyzed and reported.
  D. Mahesh Reddy , B.G. Jeyaprakash and R. John Bosco Balaguru
  Recently nanostructured based metal oxide thin films were preferred for thermoelectric applications due to its lower thermal conductivity than in bulk form. Cadmium oxide in bulk form has lower thermal conductivity and much work on thermoelectric studies in thin film is not reported. Hence in the present study, undoped, Zn and Mn doped CdO thin films were prepared on glass substrate using homemade spray pyrolysis technique and its structural, electrical, surface morphology and thermoelectric properties were analyzed and reported.
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