Browsing by Author Naik, Ramachandra

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  • Calcination-temperature-dependent-structural-modificat_2018_Journal-of-Scien.pdf.jpg
  • Article


  • Authors: Yogananda, H.S.; Nagabhushana, H.; Naik, Ramachandra; Prashantha, S.C. (2018)

  • MoO3nanoparticles were prepared by a surfactant assisted sonochemical method. Final products were calcined at 180 C, 400 C, and 600 C resulting in thef-orthorhombic,b-monoclinic, and h-hexagonal structures of MoO3,respectively. Variable morphologies were also seen from SEM images. The energy band gap of the samples was estimated to be ~3.60 eV from diffuse reflectance spectra using Kubelka-Munk function. Photoluminescence spectra exhibited a strong emission peak at ~438 nm due to the hexa-coordinated [MoO6] 5þ dz 2e dyztransitions. The results show that the samples can be used as blue light emitting components of white light emitting diodes.

  • Multi-functional-Zn2TiO4-Sm3--nanopowders--Excelle_2018_Journal-of-Science--.pdf.jpg
  • Article


  • Authors: Girish, K.M.; Prashantha, S.C.; Nagabhushana, H.; Ravikumar, C.R.; Nagaswarupa, H.P.; Naik, Ramachandra; Premakumar, H.B.; Umesh, B. (2018)

  • Zn2TiO4:Sm3+ (1-9 mol %) nano powders (NPs) were prepared by a facile solution combustion route using oxalyl dihydrazide (ODH) as a fuel. The obtained product was characterized by Powder X-ray diffraction (PXRD), Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and UV-Visible studies. Cyclic voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS) mea-surements were performed using a carbon paste electrode. CV results indicated the reversibility of the electrode reaction, whereas EIS measurements revealed a reduction in the charge transfer resistance with increase in the double layer capacitance of the electrode. The prepared electrodes also exhibite...

  • Photoluminescence and photocatalytic properties of novel Bi2O3_Sm3+ nanophosphor.pdf.jpg
  • Article


  • Authors: Ashwini, S.; Prashantha, S.C.; Naik, Ramachandra; Naik, Yashwanth V.; Nagabhushana, H.; Narasimhamurthy, K.N. (2019)

  • The current work involves studies of the synthesis, characterization and photoluminescence for Sm3+ (1-11 mol %) doped Bi2O3 nanophosphors (NPs) by a solution combustion method. The average particle size was determined using powder X-ray diffraction (PXRD) and found to be in the range of 13- 30 nm. The Kubelka-Munk (K-M) function was used to assess the energy gap of Sm3+ doped Bi2O3 nanophosphors which was found to be 2.92- 2.96 eV. From the Emission spectra, the Judd–Ofelt parameters (Ω2 and Ω4), the transition probabilities (AT), the quantum efficiency (η), the luminescence lifetime (τr), the colour chromaticity coordinates (CIE) and the correlated colour temperature (CCT) values we...

  • Photoluminescence-and-photocatalytic-propert_2019_Journal-of-Science--Advanc.pdf.jpg
  • Article


  • Authors: Ashwini, S.; Prashantha, S.C.; Naik, Ramachandra; Naik, Yashwanth V.; Nagabhushana, H.; Narasimhamurthy, K.N. (2019)

  • The current work involves studies of the synthesis, characterization and photoluminescence for Sm3þ (1 e11 mol%) doped Bi2O3 nanophosphors (NPs) by a solution combustion method. The average particle size was determined using powder X-ray diffraction (PXRD) and found to be in the range of 13e30 nm. The KubelkaeMunk (KeM) function was used to assess the energy gap of Sm3þ doped Bi2O3 nanophosphors which was found to be 2.92e2.96 eV. From the Emission spectra, the JuddeOfelt parameters (U2 and U4), the transition probabilities (AT), the quantum efficiency (h), the luminescence lifetime (tr), the colour chromaticity coordinates (CIE) and the correlated colour temperature (CCT) value...

Browsing by Author Naik, Ramachandra

Jump to: 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
or enter first few letters:  
Showing results 1 to 4 of 4
  • Calcination-temperature-dependent-structural-modificat_2018_Journal-of-Scien.pdf.jpg
  • Article


  • Authors: Yogananda, H.S.; Nagabhushana, H.; Naik, Ramachandra; Prashantha, S.C. (2018)

  • MoO3nanoparticles were prepared by a surfactant assisted sonochemical method. Final products were calcined at 180 C, 400 C, and 600 C resulting in thef-orthorhombic,b-monoclinic, and h-hexagonal structures of MoO3,respectively. Variable morphologies were also seen from SEM images. The energy band gap of the samples was estimated to be ~3.60 eV from diffuse reflectance spectra using Kubelka-Munk function. Photoluminescence spectra exhibited a strong emission peak at ~438 nm due to the hexa-coordinated [MoO6] 5þ dz 2e dyztransitions. The results show that the samples can be used as blue light emitting components of white light emitting diodes.

  • Multi-functional-Zn2TiO4-Sm3--nanopowders--Excelle_2018_Journal-of-Science--.pdf.jpg
  • Article


  • Authors: Girish, K.M.; Prashantha, S.C.; Nagabhushana, H.; Ravikumar, C.R.; Nagaswarupa, H.P.; Naik, Ramachandra; Premakumar, H.B.; Umesh, B. (2018)

  • Zn2TiO4:Sm3+ (1-9 mol %) nano powders (NPs) were prepared by a facile solution combustion route using oxalyl dihydrazide (ODH) as a fuel. The obtained product was characterized by Powder X-ray diffraction (PXRD), Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and UV-Visible studies. Cyclic voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS) mea-surements were performed using a carbon paste electrode. CV results indicated the reversibility of the electrode reaction, whereas EIS measurements revealed a reduction in the charge transfer resistance with increase in the double layer capacitance of the electrode. The prepared electrodes also exhibite...

  • Photoluminescence and photocatalytic properties of novel Bi2O3_Sm3+ nanophosphor.pdf.jpg
  • Article


  • Authors: Ashwini, S.; Prashantha, S.C.; Naik, Ramachandra; Naik, Yashwanth V.; Nagabhushana, H.; Narasimhamurthy, K.N. (2019)

  • The current work involves studies of the synthesis, characterization and photoluminescence for Sm3+ (1-11 mol %) doped Bi2O3 nanophosphors (NPs) by a solution combustion method. The average particle size was determined using powder X-ray diffraction (PXRD) and found to be in the range of 13- 30 nm. The Kubelka-Munk (K-M) function was used to assess the energy gap of Sm3+ doped Bi2O3 nanophosphors which was found to be 2.92- 2.96 eV. From the Emission spectra, the Judd–Ofelt parameters (Ω2 and Ω4), the transition probabilities (AT), the quantum efficiency (η), the luminescence lifetime (τr), the colour chromaticity coordinates (CIE) and the correlated colour temperature (CCT) values we...

  • Photoluminescence-and-photocatalytic-propert_2019_Journal-of-Science--Advanc.pdf.jpg
  • Article


  • Authors: Ashwini, S.; Prashantha, S.C.; Naik, Ramachandra; Naik, Yashwanth V.; Nagabhushana, H.; Narasimhamurthy, K.N. (2019)

  • The current work involves studies of the synthesis, characterization and photoluminescence for Sm3þ (1 e11 mol%) doped Bi2O3 nanophosphors (NPs) by a solution combustion method. The average particle size was determined using powder X-ray diffraction (PXRD) and found to be in the range of 13e30 nm. The KubelkaeMunk (KeM) function was used to assess the energy gap of Sm3þ doped Bi2O3 nanophosphors which was found to be 2.92e2.96 eV. From the Emission spectra, the JuddeOfelt parameters (U2 and U4), the transition probabilities (AT), the quantum efficiency (h), the luminescence lifetime (tr), the colour chromaticity coordinates (CIE) and the correlated colour temperature (CCT) value...