Structural and phase dependent thermo and photoluminescent properties of Dy(OH)(3) and Dy2O3 nanorods

Chandrasekhar, M and Sunitha, DV and Dhananjaya, N and Nagabhushana, H and Sharma, SC and Nagabhushana, BM and Shivakumara, C and Chakradhar, RPS (2012) Structural and phase dependent thermo and photoluminescent properties of Dy(OH)(3) and Dy2O3 nanorods. Materials Research Bulletin, 47 (8). pp. 2085-2094. ISSN 0025-5408

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Abstract

Hexagonal Dy(OH)3 and cubic Dy2O3 nanorods were prepared by hydrothermal method. Dy(OH)3 nanorods was directly obtained at 180 °C for 20 h after hydrothermal treatment whereas subsequently heat treatment at 750 °C for 2 h gives pure cubic Dy2O3. SEM micrographs reveal that needle shaped rods with different sizes were observed in both the phases. TEM results also confirm this. The TL response of hexagonal Dy(OH)3 and cubic Dy2O3 nanorods have been analyzed for γ-irradiation over a wide range of exposures (1–5 kGy). TL glow peak intensity increases with γ dose in both the phases. The activation energy (E), order of kinetics (b), and frequency factor (s) for both the phases have been determined using Chen's peak shape method. The simple glow curve shape, structure and linear response to γ-irradiation over a large span of exposures makes the cubic Dy2O3 as a useful dosimetric material to estimate high exposures of γ-rays.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to M/s. Elsevier
Uncontrolled Keywords: Inorganic compounds;Chemical synthesis;X-ray diffraction; Luminescence
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
ENGINEERING > Structural Mechanics
Division/Department: Other, Other, Other, Other, Other, Other, Other, Surface Engineering Division
Depositing User: Ms. Alphones Mary
Date Deposited: 16 Sep 2013 10:03
Last Modified: 16 Sep 2013 10:03
URI: http://nal-ir.nal.res.in/id/eprint/11766

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