Iron oxide nanoparticles fabricated by electric explosion of wire: focus on magnetic nanofluids / Beketov I. V.,Safronov A. P.,Medvedev A. I.,Alonso J.,Kurlyandskaya G. V.,Bhagat S. M. // AIP ADVANCES. - 2012. - V. 2, l. 2.

ISSN/EISSN:

2158-3226 / нет данных

Type:

Article

Abstract:

Nanoparticles of iron oxides (MNPs) were prepared using the electric explosion of wire technique (EEW). The main focus was on the fabrication of de-aggregated spherical nanoparticles with a narrow size distribution. According to XRD the major crystalline phase was magnetite with an average diameter of MNPs, depending on the fraction. Further separation of air-dry EEW nanoparticles was performed in aqueous suspensions. In order to provide the stability of magnetite suspension in water, we found the optimum concentration of the electrostatic stabilizer (sodium citrate and optimum pH level) based on zeta-potential measurements. The stable suspensions still contained a substantial fraction of aggregates which were disintegrated by the excessive ultrasound treatment. The separation of the large particles out of the suspension was performed by centrifuging. The structural features, magnetic properties and microwave absorption of MNPs and their aqueous solutions confirm that we were able to obtain an ensemble in which the magnetic contributions come from the spherical MNPs. The particle size distribution in fractionated samples was narrow and they showed a similar behaviour to that expected of the superparamagnetic ensemble. Maximum obtained concentration was as high as 5 \% of magnetic material (by weight). Designed assembly of de-aggregated nanoparticles is an example of on-purpose developed magnetic nanofluid. Copyright 2012 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License. {[}http://dx.doi.org/10.1063/1.4730405]

Author keywords:

HYDROTHERMAL PREPARATION; MICROWAVE-ABSORPTION; FE3O4 NANOPARTICLES; TEMPERATURE; DEPENDENCE; STABILITY; SUSPENSIONS; DISPERSION; PARTICLE; POWDERS

DOI:

10.1063/1.4730405

Web of Science ID:

ISI:000305831300055

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN
Publisher	AMER INST PHYSICS
Address	CIRCULATION \& FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA
Language	English
Article-Number	022154
Keywords-Plus	HYDROTHERMAL PREPARATION; MICROWAVE-ABSORPTION; FE3O4 NANOPARTICLES; TEMPERATURE; DEPENDENCE; STABILITY; SUSPENSIONS; DISPERSION; PARTICLE; POWDERS
Research-Areas	Science \& Technology - Other Topics; Materials Science; Physics
Web-of-Science-Categories	Nanoscience \& Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied
Author-Email	galina@we.lc.ehu.es
ResearcherID-Numbers	Boroun, Shahab/E-4689-2015 Beketov, Igor/I-3538-2014 SGIKER, Cienciometria/A-5759-2012
ORCID-Numbers	Kurlyandskaya, Galina/0000-0002-3712-1637
Funding-Acknowledgement	University of Maryland visiting grant; RFBR grant {[}10-02-96015]; UrFU grant {[}215]; Basque Government grant {[}IT-347-07]; ACTIMAT ETORTEK grant
Funding-Text	This work was supported by the University of Maryland visiting grant, and RFBR 10-02-96015, UrFU 215 and Basque Government IT-347-07 and ACTIMAT ETORTEK grants. Selected measurements were performed at SGIker service of UPV-EHU. We thank A. M. Murzakayev, S. E. Lofland, I. Orue, A. Larranaga, V.O. Vaskovskiy and Kate Wickersham for special support.
Number-of-Cited-References	49
Usage-Count-Since-2013	26
Journal-ISO	AIP Adv.
Doc-Delivery-Number	966IO