Staff View: Enriched second-harmonic generation in meta-phase barium titanate nanostructures synthesized by sol-gel hydrothermal method

Enriched second-harmonic generation in meta-phase barium titanate nanostructures synthesized by sol-gel hydrothermal method

This study reports on the second harmonic generation (SHG) of barium titanate (BaTiO3) nanoparticles synthesized by a low-cost and easily-accessible sol-gel hydrothermal method at different temperatures (100-250 degrees C). According to the powder X-ray diffraction (XRD) pattern, all of the prepared...

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Main Authors:	Mahalakshmi, S., Mayandi, Jeyanthinath, Sagadevan, Suresh, Ragavendran, V, Manikandan, K., Arumugam, S., Pearce, J. M., Venkatachalapathy, Vishnukanthan
Format:	Article
Published:	Elsevier Science SA 2023
Subjects:	QD Chemistry TN Mining engineering. Metallurgy
Online Access:	http://eprints.um.edu.my/39266/
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spelling	my.um.eprints.392662023-11-29T03:45:09Z http://eprints.um.edu.my/39266/ Enriched second-harmonic generation in meta-phase barium titanate nanostructures synthesized by sol-gel hydrothermal method Mahalakshmi, S. Mayandi, Jeyanthinath Sagadevan, Suresh Ragavendran, V Manikandan, K. Arumugam, S. Pearce, J. M. Venkatachalapathy, Vishnukanthan QD Chemistry TN Mining engineering. Metallurgy This study reports on the second harmonic generation (SHG) of barium titanate (BaTiO3) nanoparticles synthesized by a low-cost and easily-accessible sol-gel hydrothermal method at different temperatures (100-250 degrees C). According to the powder X-ray diffraction (XRD) pattern, all of the prepared samples had meta-phase without a center of symmetry, and the crystal structure changes from simple cubic to rhom-bohedral at different temperatures. In addition to XRD, differential scanning calorimetry (DSC) confirms the meta-phase in BaTiO3 by showing a significant phase shift indicating structural distortion. The variation in particle size was observed from transmission electron microscope (TEM) and the selected area electron diffraction (SAED) pattern as well supports the presence of structural distortion in the nanomaterials. The phase variation in BaTiO3 has not only affected its structure but also creates a disorder in its magnetic properties by changing it from paramagnetic to ferromagnetic for different synthesizing temperatures. This was determined with a vibrating sample magnetometer (VSM) and electron paramagnetic resonance (EPR) techniques. As a consequence of this structural deformation, particle size variation, and magnetic phase transition the second harmonic generation (SHG) conversion efficiency of BaTiO3 has been improved. Hence, this technique for synthesizing nanomaterials could be a promising candidate for fabricating bio-compatible imaging probes and coherent bio-markers in the field of medicine and electronics.(c) 2022 Elsevier B.V. All rights reserved. Elsevier Science SA 2023-03-05 Article PeerReviewed Mahalakshmi, S. and Mayandi, Jeyanthinath and Sagadevan, Suresh and Ragavendran, V and Manikandan, K. and Arumugam, S. and Pearce, J. M. and Venkatachalapathy, Vishnukanthan (2023) Enriched second-harmonic generation in meta-phase barium titanate nanostructures synthesized by sol-gel hydrothermal method. Journal of Alloys and Compounds, 936. ISSN 0925-8388, DOI https://doi.org/10.1016/j.jallcom.2022.168171 <https://doi.org/10.1016/j.jallcom.2022.168171>. 10.1016/j.jallcom.2022.168171
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	QD Chemistry TN Mining engineering. Metallurgy
spellingShingle	QD Chemistry TN Mining engineering. Metallurgy Mahalakshmi, S. Mayandi, Jeyanthinath Sagadevan, Suresh Ragavendran, V Manikandan, K. Arumugam, S. Pearce, J. M. Venkatachalapathy, Vishnukanthan Enriched second-harmonic generation in meta-phase barium titanate nanostructures synthesized by sol-gel hydrothermal method
description	This study reports on the second harmonic generation (SHG) of barium titanate (BaTiO3) nanoparticles synthesized by a low-cost and easily-accessible sol-gel hydrothermal method at different temperatures (100-250 degrees C). According to the powder X-ray diffraction (XRD) pattern, all of the prepared samples had meta-phase without a center of symmetry, and the crystal structure changes from simple cubic to rhom-bohedral at different temperatures. In addition to XRD, differential scanning calorimetry (DSC) confirms the meta-phase in BaTiO3 by showing a significant phase shift indicating structural distortion. The variation in particle size was observed from transmission electron microscope (TEM) and the selected area electron diffraction (SAED) pattern as well supports the presence of structural distortion in the nanomaterials. The phase variation in BaTiO3 has not only affected its structure but also creates a disorder in its magnetic properties by changing it from paramagnetic to ferromagnetic for different synthesizing temperatures. This was determined with a vibrating sample magnetometer (VSM) and electron paramagnetic resonance (EPR) techniques. As a consequence of this structural deformation, particle size variation, and magnetic phase transition the second harmonic generation (SHG) conversion efficiency of BaTiO3 has been improved. Hence, this technique for synthesizing nanomaterials could be a promising candidate for fabricating bio-compatible imaging probes and coherent bio-markers in the field of medicine and electronics.(c) 2022 Elsevier B.V. All rights reserved.
format	Article
author	Mahalakshmi, S. Mayandi, Jeyanthinath Sagadevan, Suresh Ragavendran, V Manikandan, K. Arumugam, S. Pearce, J. M. Venkatachalapathy, Vishnukanthan
author_facet	Mahalakshmi, S. Mayandi, Jeyanthinath Sagadevan, Suresh Ragavendran, V Manikandan, K. Arumugam, S. Pearce, J. M. Venkatachalapathy, Vishnukanthan
author_sort	Mahalakshmi, S.
title	Enriched second-harmonic generation in meta-phase barium titanate nanostructures synthesized by sol-gel hydrothermal method
title_short	Enriched second-harmonic generation in meta-phase barium titanate nanostructures synthesized by sol-gel hydrothermal method
title_full	Enriched second-harmonic generation in meta-phase barium titanate nanostructures synthesized by sol-gel hydrothermal method
title_fullStr	Enriched second-harmonic generation in meta-phase barium titanate nanostructures synthesized by sol-gel hydrothermal method
title_full_unstemmed	Enriched second-harmonic generation in meta-phase barium titanate nanostructures synthesized by sol-gel hydrothermal method
title_sort	enriched second-harmonic generation in meta-phase barium titanate nanostructures synthesized by sol-gel hydrothermal method
publisher	Elsevier Science SA
publishDate	2023
url	http://eprints.um.edu.my/39266/
_version_	1783876680789524480
score	13.211869

Enriched second-harmonic generation in meta-phase barium titanate nanostructures synthesized by sol-gel hydrothermal method

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