Title: Synthesis, structural characterisation and optical properties of nanoparticles of MTiO₃ (M = Ni and Co) obtained by the chemical method

Authors: R. Vijayalakshmi; V. Rajendran

Addresses: Department of Physics, Presidency College, Chepauk, Chennai-600 005, Tamilnadu, India ' Department of Physics, Presidency College, Chepauk, Chennai-600 005, Tamilnadu, India

Abstract: In this paper, we report on the obtention of nanoparticles of nickel and cobalt titanates MTiO₃ (M = Ni and Co) with type-ilmenite rhombohedral structure prepared by the chemical method and heat-treated at 500°C for 3 h. These nanoparticles were characterised by X-ray diffraction, Fourier-transform infrared, scanning electron microscopy, transmission electron microscopy, ultra violet-visible absorption spectroscopy and photoluminescence measurements. A TEM image reveals that the as-synthesised ultra-fine samples consist of florets of cauliflower and spherical-like morphology of crystalline particles from 15 to 30 nm, which is weakly, aggregated. The optical properties of the as-prepared sample were investigated. The results suggest that the size, morphology and optical properties are enhanced in both the metal titanates MTiO₃ (M = Ni and Co) nanoparticles.

Keywords: optical properties; metal titanates; morphology; nanoparticles; photoluminescence; structural characterisation; nanotechnology; nickel titanate; cobalt titanate.

DOI: 10.1504/IJNP.2013.051916

International Journal of Nanoparticles, 2013 Vol.6 No.1, pp.28 - 37

Received: 28 Aug 2011
Accepted: 05 Apr 2012
Published online: 31 Mar 2014 *

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