Estimation of lattice strain in nanocrystalline RuO2 by Williamson-Hall and size-strain plot methods

R Sivakami; S Dhanuskodi; R Karvembu

doi:10.1016/j.saa.2015.07.008

Estimation of lattice strain in nanocrystalline RuO2 by Williamson-Hall and size-strain plot methods

Spectrochim Acta A Mol Biomol Spectrosc. 2016 Jan 5:152:43-50. doi: 10.1016/j.saa.2015.07.008. Epub 2015 Jul 6.

Authors

R Sivakami¹, S Dhanuskodi², R Karvembu³

Affiliations

¹ School of Physics, Bharathidasan University, Tiruchirappalli 620 024, India.
² School of Physics, Bharathidasan University, Tiruchirappalli 620 024, India. Electronic address: dhanus2k3@yahoo.com.
³ Department of Chemistry, National Institute of Technology, Tiruchirappalli 620 015, India. Electronic address: kar@nitt.edu.

PMID: 26186396
DOI: 10.1016/j.saa.2015.07.008

Abstract

RuO2 nanoparticles (RuO2 NPs) have been successfully synthesized by the hydrothermal method. Structure and the particle size have been determined by X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM) and transmission electron microscopy (TEM). UV-Vis spectra reveal that the optical band gap of RuO2 nanoparticles is red shifted from 3.95 to 3.55eV. BET measurements show a high specific surface area (SSA) of 118-133m(2)/g and pore diameter (10-25nm) has been estimated by Barret-Joyner-Halenda (BJH) method. The crystallite size and lattice strain in the samples have been investigated by Williamson-Hall (W-H) analysis assuming uniform deformation, deformation stress and deformation energy density, and the size-strain plot method. All other relevant physical parameters including stress, strain and energy density have been calculated. The average crystallite size and the lattice strain evaluated from XRD measurements are in good agreement with the results of TEM.

Keywords: Hydrothermal synthesis; RuO(2) nanoparticles; Size–strain plot; Williamson–Hall analysis.

Publication types

Research Support, Non-U.S. Gov't