4 publications
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Published Subscription
Preparation and Characterization of Lanthanum Doped Calcium Aluminate Nanophosphor (CaAl2O4: La) by Sol-Gel MethodBy M Freeda, G. Suresh
Abstract: Abstract Lanthanum doped calcium aluminate nanophosphor (CaAl2O4: La) was prepared by sol-gel method. Characterizations such as XRD, SEM, EDAX and PL were done. Monoclinic structure was confirmed by the XRD analysis; the particle size was found to be 27 nm and is determined by (Williamson and Hall plot) W-H plot method. It shows that the particles were of small granular structure, and were interlinked with each other, lead to the …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 6, Issue 1, 2016 · pp. 24–28 Read article →
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A Simple Sol–Gel Route for the Synthesis and Characterization of Tm-Doped CaAl2O4 NanophosphorBy M Freeda, G. Suresh
Abstract: Calcium Aluminate nanophosphor doped with Thulium (CaAl2O4: Tm) was synthesized by simple sol–gel route. The obtained nanophosphor was characterized by X-ray diffraction technique (XRD). The surface morphology was determined by scanning electron microscopy (SEM). Also photoluminescence spectra (PL), and thermogravimetric analysis/differential scanning calorimetry (TGA/DSC) characterization were done. The XRD revealed the formation of monoclinic structure and the particle size was determined by Scherrer formula. It showed that the particles were …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 6, Issue 1, 2016 · pp. 6–10 Read article →
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A Comparative Study of Structure, Morphology and Optical Properties of CaAl2O4 Phosphors by Sol–Gel MethodBy Freeda M, G. Suresh
Abstract: In this paper, monoclinic CaAl2O4 phosphor with different weight percentage of aluminium was synthesized by low temperature sol–gel method. The prepared samples were characterized by X-ray diffraction (XRD) analysis, Fourier transform infra red (FTIR), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and photoluminescence emission spectra (PL). The XRD analysis showed that CaAl2O4 have monoclinic structure. The average size of the particles lies between 88 and 109 nm. It was …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 5, Issue 3, 2015 · pp. 1–10 Read article →
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Synthesis by Sol–Gel Method and Characterization of CaAlO: Mn, Dy NanoparticlesBy Freeda M, G. Suresh
Abstract: Dy and Mn doped Calcium Aluminate nanoparticles were synthesized by using Sol-gel method. Heat treated material was characterized by X-ray diffraction(XRD), optical study of photoluminescence (PL) emission spectra, morphological study of scanning electron microscopy (SEM) combined with X-ray analysis. The Dy and Mn doped phosphor exhibits emission at the excitation of the material with 380 nm wavelength generates a strong emission at 480 nm. Besides this, subsidiary maxima at 417, …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 4, Issue 2, 2014 · pp. 23–27 Read article →