Size-dependent magnetic responsiveness of magnetite nanoparticles synthesised by co-precipitation and solvothermal methods

The dependence of the magnetic responsiveness on magnetite nanoparticle size has been studied. Monodisperse magnetite nanoparticles of 10 nm diameter were prepared by an ultrasonically enhanced co-precipitation procedure. A carboxyl-functionalised solvothermal approach was applied to synthesise magn...

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Main Authors:	Thanh Quang Bui, Suong Nu-Cam Ton, Anh Trong Duong, Hoa Thai Tran
Format:	Article
Language:	English
Published:	Elsevier 2018-03-01
Series:	Journal of Science: Advanced Materials and Devices
Online Access:	http://www.sciencedirect.com/science/article/pii/S2468217917301831

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record_format	Article
spelling	doaj-79d301b4ca0941d5a7967dbb548fb1702020-11-24T22:26:06ZengElsevierJournal of Science: Advanced Materials and Devices2468-21792018-03-0131107112Size-dependent magnetic responsiveness of magnetite nanoparticles synthesised by co-precipitation and solvothermal methodsThanh Quang Bui0Suong Nu-Cam Ton1Anh Trong Duong2Hoa Thai Tran3Corresponding author. 77 Nguyen Hue, Hue, Viet Nam.; Department of Chemistry, College of Sciences, Hue University, Viet NamDepartment of Chemistry, College of Sciences, Hue University, Viet NamDepartment of Chemistry, College of Sciences, Hue University, Viet NamDepartment of Chemistry, College of Sciences, Hue University, Viet NamThe dependence of the magnetic responsiveness on magnetite nanoparticle size has been studied. Monodisperse magnetite nanoparticles of 10 nm diameter were prepared by an ultrasonically enhanced co-precipitation procedure. A carboxyl-functionalised solvothermal approach was applied to synthesise magnetite nanoparticles with an average size of 30 nm. The particle sizes and their distribution have been determined by analysing TEM images and considering nanoparticle formation mechanisms. The magnetic characterisation revealed an inverse dependence between the magnetite nanoparticle size and its ability to respond to external magnetic fields, which was explained by the decrease of magnetic dipoles inside the tailing-away crystal of the magnetite nanoparticles. Negligible hysteresis with a small value of 5 Oe was found for the 10 nm nanoparticles, while the larger value of 80 Oe was determined for the 30 nm nanoparticles. Keywords: Fe3O4, Magnetite nanoparticles, Co-precipitation, Solvothermal, Magnetic responsiveness-particle size relationshiphttp://www.sciencedirect.com/science/article/pii/S2468217917301831
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Thanh Quang Bui Suong Nu-Cam Ton Anh Trong Duong Hoa Thai Tran
spellingShingle	Thanh Quang Bui Suong Nu-Cam Ton Anh Trong Duong Hoa Thai Tran Size-dependent magnetic responsiveness of magnetite nanoparticles synthesised by co-precipitation and solvothermal methods Journal of Science: Advanced Materials and Devices
author_facet	Thanh Quang Bui Suong Nu-Cam Ton Anh Trong Duong Hoa Thai Tran
author_sort	Thanh Quang Bui
title	Size-dependent magnetic responsiveness of magnetite nanoparticles synthesised by co-precipitation and solvothermal methods
title_short	Size-dependent magnetic responsiveness of magnetite nanoparticles synthesised by co-precipitation and solvothermal methods
title_full	Size-dependent magnetic responsiveness of magnetite nanoparticles synthesised by co-precipitation and solvothermal methods
title_fullStr	Size-dependent magnetic responsiveness of magnetite nanoparticles synthesised by co-precipitation and solvothermal methods
title_full_unstemmed	Size-dependent magnetic responsiveness of magnetite nanoparticles synthesised by co-precipitation and solvothermal methods
title_sort	size-dependent magnetic responsiveness of magnetite nanoparticles synthesised by co-precipitation and solvothermal methods
publisher	Elsevier
series	Journal of Science: Advanced Materials and Devices
issn	2468-2179
publishDate	2018-03-01
description	The dependence of the magnetic responsiveness on magnetite nanoparticle size has been studied. Monodisperse magnetite nanoparticles of 10 nm diameter were prepared by an ultrasonically enhanced co-precipitation procedure. A carboxyl-functionalised solvothermal approach was applied to synthesise magnetite nanoparticles with an average size of 30 nm. The particle sizes and their distribution have been determined by analysing TEM images and considering nanoparticle formation mechanisms. The magnetic characterisation revealed an inverse dependence between the magnetite nanoparticle size and its ability to respond to external magnetic fields, which was explained by the decrease of magnetic dipoles inside the tailing-away crystal of the magnetite nanoparticles. Negligible hysteresis with a small value of 5 Oe was found for the 10 nm nanoparticles, while the larger value of 80 Oe was determined for the 30 nm nanoparticles. Keywords: Fe3O4, Magnetite nanoparticles, Co-precipitation, Solvothermal, Magnetic responsiveness-particle size relationship
url	http://www.sciencedirect.com/science/article/pii/S2468217917301831
work_keys_str_mv	AT thanhquangbui sizedependentmagneticresponsivenessofmagnetitenanoparticlessynthesisedbycoprecipitationandsolvothermalmethods AT suongnucamton sizedependentmagneticresponsivenessofmagnetitenanoparticlessynthesisedbycoprecipitationandsolvothermalmethods AT anhtrongduong sizedependentmagneticresponsivenessofmagnetitenanoparticlessynthesisedbycoprecipitationandsolvothermalmethods AT hoathaitran sizedependentmagneticresponsivenessofmagnetitenanoparticlessynthesisedbycoprecipitationandsolvothermalmethods
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Size-dependent magnetic responsiveness of magnetite nanoparticles synthesised by co-precipitation and solvothermal methods

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