Synthesis, luminescence properties and EPR investigation of hydrothermally derived uniform ZnO hexagonal rods

Reddy, AJ and Krishna, RH and Nagabhushana, BM and Kokila, MK and Nagabhushana, H and Shivakumara, C and Chakradhar, RPS (2015) Synthesis, luminescence properties and EPR investigation of hydrothermally derived uniform ZnO hexagonal rods. Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 139. pp. 262-270. ISSN 13861425

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Abstract

One-dimensional (1D) zinc oxide (ZnO) hexagonal rods have been successfully synthesized by surfactant free hydrothermal process at different temperatures. It can be found that the reaction temperature play a crucial role in the formation of ZnO uniform hexagonal rods. The possible formation processes of 1-D ZnO hexagonal rods were investigated. The zinc hydroxide acts as the morphology-formative intermediate for the formation of ZnO nanorods. Upon excitation at 325 nm, the sample prepared at 180 °C show several emission bands at 400 nm (∼3.10 eV), 420 nm (∼2.95 eV), 482 nm (∼2.57 eV) and 524 nm (∼2.36 eV) corresponding to different kind of defects. TL studies were carried out by pre-irradiating samples with γ-rays ranging from 1 to 7 kGy at room temperature. A well resolved glow peak at ∼354 °C was recorded which can be ascribed to deep traps. Furthermore, the defects associated with surface states in ZnO nano-structures are characterized by electron paramagnetic resonance.

Item Type: Article
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
CHEMISTRY AND MATERIALS > Composite Materials
Depositing User: Mrs SK Pratibha
Date Deposited: 19 Jun 2018 08:58
Last Modified: 19 Jun 2018 08:58
URI: http://nal-ir.nal.res.in/id/eprint/12808

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