Abstract
ABSTRACTThe barium titanate (BT) microspheres were synthesized via the low temperature hydrothermal technique. The X-ray diffraction pattern confirmed the formation of cubic perovskite structure of the material. The average crystallite size (Dp) was found to be of 21 nm using the Scherrer method. The Williamson–Hall plot was drawn for evaluating the micro-strain and crystallite diameter. The relation between micro-strain (ε) and Dp was illustrated as a function of diffraction angle (2θ). The morphology was analyzed by field emission and transmission electron microscope. The results expressed the formation of microspheres. In addition to these, the optical bandgap (Eop) and maximum absorption wavelength (λm) were achieved to be of 3.23 eV and 340 nm, respectively. The presence of metal oxide bonds (M-O) was observed which in turn attributes the formation of cubic structure.
Highlights
Nanoparticle-synthesis techniques have got more importance than the bulk-synthesis technique owing to their potential applications in biomedical sciences, drug delivery systems, sensors, nanofibers, carbon nanotubes, quantun dots, photocatalysis, dielectric, ferroelectric, and piezoelectric properties [1]
More recently Selvarajan et al [7] prepared the piezoelectric barium titanate (BT) nanoparticles and proposed that it can be used as an active biosensor for the biomolecular detection via the conventional solidstate reaction method
These reflection planes are in good agreement with Joint Committee on Powder Diffraction Standards (JCPDS) data of file number: 89–2475
Summary
Nanoparticle-synthesis techniques have got more importance than the bulk-synthesis technique owing to their potential applications in biomedical sciences, drug delivery systems, sensors, nanofibers, carbon nanotubes, quantun dots, photocatalysis, dielectric, ferroelectric, and piezoelectric properties [1]. The barium titanate (BT) is a promising dielectric material and showed tremendous applications as multilayer ceramic capacitors due to decrease of particle size [2]. The reduction in particle size can be attributed to the usage of low-operating temperatures while conducting the synthesis part of work. All the above-stated techniques focussed on the structural, morphological, Raman & IR-spectra, UV-visible spectra, dielectric, and ferroelectric properties. According to the literature survey, the BT nanoparticles were mainly focussed to reveal the biomedical and sensor applications. In the current investigation, the authors focussed to elucidate the structural, morphological, and optical properties of BT microspheres
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