IThemba LABS National Research Foundation NRF of South Africa

Somerset East, South Africa

IThemba LABS National Research Foundation NRF of South Africa

Somerset East, South Africa
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PubMed | National Science Foundation, St Xaviers College Autonomous, Durban University of Technology and iThemba LABS National Research Foundation NRF of South Africa
Type: | Journal: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy | Year: 2015

In this report, we examine the progress in adapting these nanomaterials for several predominantly photonics device fabrication by wet-chemical method. Nanocomposite of magnesium oxide (MgO) with copper oxide (CuO) doped nanoparticles were characterized by X-ray powder diffraction (XRD) and the observed peaks are quite agreeable with the pure phase cubic structure. High-resolution transmission electron microscopic (HR-TEM) results reveal that the resultant nanopowders are porous and agglomerated with polycrystalline nano-entities. Field emission of selected-area electron diffraction (SAED) studies showed that the average size of the nanoparticles were 20nm. Photoluminescence spectra of MgO:CuO were investigated, showing emission peaks around 375nm relating to new energy levels induced by defects or defect levels generation and confocal micro-Raman images indicated that the chemical molecular vibrational band structure and morphology of the product which is spherical shaped nanoparticles with an average particle size of 25nm with standard deviation. The electrochemical response of MgO:CuO which is proves that the nano-copper/magnesium has high functionality due to the small size and it has higher electrochemical activity without any modifications.


Kaviyarasu K.,Materials Research Center | Manikandan E.,B.S. Abdur Rahman University | Manikandan E.,IThemba LABS National Research Foundation NRF of South Africa | Kennedy J.,Institute of Geological & Nuclear Sciences | Jayachandran M.,CSIR - Central Electrochemical Research Institute
Materials Letters | Year: 2014

The present technique may open a new doorway to one dimensional nanofibers from the same kind of materials with irregular shape or large size. Intense photoluminescence was also observed with some spectral tuning possibly giving a range of emission photon energies approximately spanning from 2.5 to 3.4 eV. The resulted CdO nanofibers have an average size in the range of 50 nm and a uniform cubic shape shown by electron microscopy analysis. μ-Raman spectroscopy showed that the products were NaCl cubic structure CdO with the first and second harmonic modes at 303.5 cm-1 and 593.0 cm -1 respectively. The above studies demonstrate the potential for the utilization of cadmium oxide nanofibers in visible opto-electronics applications. © 2014 Elsevier B.V.


Kaviyarasu K.,Sri Sankara Arts and Science College | Kaviyarasu K.,IThemba LABS National Research Foundation NRF of South Africa | Maria Magdalane C.,St Xaviers College Autonomous | Anand K.,Durban University of Technology | And 2 more authors.
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy | Year: 2015

In this report, we examine the progress in adapting these nanomaterials for several predominantly photonics device fabrication by wet-chemical method. Nanocomposite of magnesium oxide (MgO) with copper oxide (CuO) doped nanoparticles were characterized by X-ray powder diffraction (XRD) and the observed peaks are quite agreeable with the pure phase cubic structure. High-resolution transmission electron microscopic (HR-TEM) results reveal that the resultant nanopowders are porous and agglomerated with polycrystalline nano-entities. Field emission of selected-area electron diffraction (SAED) studies showed that the average size of the nanoparticles were 20 nm. Photoluminescence spectra of MgO:CuO were investigated, showing emission peaks around 375 nm relating to new energy levels induced by defects or defect levels generation and confocal micro-Raman images indicated that the chemical molecular vibrational band structure and morphology of the product which is spherical shaped nanoparticles with an average particle size of ∼25 nm with standard deviation. The electrochemical response of MgO:CuO which is proves that the nano-copper/magnesium has high functionality due to the small size and it has higher electrochemical activity without any modifications. © 2015 Published by Elsevier B.V.

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