About: Effect of hydrophobic coating on the magnetic anisotropy and radiofrequency heating of gamma-Fe2O3 nanoparticles

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About: Effect of hydrophobic coating on the magnetic anisotropy and radiofrequency heating of gamma-Fe2O3 nanoparticles Goto Sponge NotDistinct Permalink

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Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1016/j.jmmm.2013.02.051
Description	The effect of a hydrophobic (oleic acid) coating on the magnetic properties of maghemite (gamma-Fe2O3) nanoparticles was investigated. The nanoparticles were prepared by a novel bi-phasic co-precipitation route and their properties compared with uncoated nanoparticles and nanoparticles prepared by a standard single-phase process. The oleic acid coated nanoparticles had a mean diameter of 6 nm when the two-phase precipitation procedure was used compared to 12 nm for nanoparticles prepared in a single phase under otherwise identical conditions. Super Quantum Interference Device measurements show superparamagnetism of the nanoparticles, with a saturation magnetization at 4 K to be 66.4 emu/g and 89.0 emu/g for the coated nanoparticles obtained by two- and single-phase procedure, respectively. Zero-field-cooled and field-cooled curves reveal a dramatic shift in the blocking temperature of the coated nanoparticles, and a significant change in their anisotropy. The hydrophobic nanoparticles were able to form stable ferrofluids in a range of organic solvents and show good heating rates in a 400 kHz alternating magnetic field. The effect of a hydrophobic (oleic acid) coating on the magnetic properties of maghemite (gamma-Fe2O3) nanoparticles was investigated. The nanoparticles were prepared by a novel bi-phasic co-precipitation route and their properties compared with uncoated nanoparticles and nanoparticles prepared by a standard single-phase process. The oleic acid coated nanoparticles had a mean diameter of 6 nm when the two-phase precipitation procedure was used compared to 12 nm for nanoparticles prepared in a single phase under otherwise identical conditions. Super Quantum Interference Device measurements show superparamagnetism of the nanoparticles, with a saturation magnetization at 4 K to be 66.4 emu/g and 89.0 emu/g for the coated nanoparticles obtained by two- and single-phase procedure, respectively. Zero-field-cooled and field-cooled curves reveal a dramatic shift in the blocking temperature of the coated nanoparticles, and a significant change in their anisotropy. The hydrophobic nanoparticles were able to form stable ferrofluids in a range of organic solvents and show good heating rates in a 400 kHz alternating magnetic field. (en)
Title	Effect of hydrophobic coating on the magnetic anisotropy and radiofrequency heating of gamma-Fe2O3 nanoparticles Effect of hydrophobic coating on the magnetic anisotropy and radiofrequency heating of gamma-Fe2O3 nanoparticles (en)
skos:prefLabel	Effect of hydrophobic coating on the magnetic anisotropy and radiofrequency heating of gamma-Fe2O3 nanoparticles Effect of hydrophobic coating on the magnetic anisotropy and radiofrequency heating of gamma-Fe2O3 nanoparticles (en)
skos:notation	RIV/00216208:11320/13:10139980!RIV14-GA0-11320___
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP108/10/1006), P(GPP206/11/P405), P(LM2011025)
http://linked.open...iv/cisloPeriodika	August
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Svoboda, Pavel
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Matematicko-fyzikální fakulta
http://linked.open...dnocenehoVysledku	71552
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/13:10139980
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Maghemite; Blocking temperature; Saturation magnetization; Superparamagnetism; Nanoparticle (en)
http://linked.open.../riv/klicoveSlovo	Blocking temperature Saturation magnetization Maghemite Nanoparticle Superparamagnetism
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[880AE100D932]
http://linked.open...i/riv/nazevZdroje	Journal of Magnetism and Magnetic Materials
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Development and application of vibrational spectroscopic techniques for the characterization of chemical robots’ bodies MLTL - Magnetism and Low Temperature Laboratories - operation and development of national research infrastructure Novel materials with pronounced application potential
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	339
http://linked.open...iv/tvurceVysledku	Svoboda, Pavel Šantavá, Eva Štěpánek, František Prokopec, Vadym Singh, Mandeep Ulbrich, Pavel
http://linked.open...ain/vavai/riv/wos	000318904100019
issn	0304-8853
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.jmmm.2013.02.051
http://localhost/t...ganizacniJednotka	11320

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