Microstructure and effective properties of nanocomposites: Ferrofluids as tunable model systems

Pelster, R; Spanoudaki, A; Kruse, T

dc.contributor.author	Pelster, R	en
dc.contributor.author	Spanoudaki, A	en
dc.contributor.author	Kruse, T	en
dc.date.accessioned	2014-03-01T02:42:52Z
dc.date.available	2014-03-01T02:42:52Z
dc.date.issued	2004	en
dc.identifier.issn	00223727	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/31116
dc.subject	Effective Properties	en
dc.subject	Microstructures	en
dc.subject	Model System	en
dc.subject.other	Agglomeration	en
dc.subject.other	Anisotropy	en
dc.subject.other	Colloids	en
dc.subject.other	Computer simulation	en
dc.subject.other	Electromagnetic fields	en
dc.subject.other	Electromagnetic shielding	en
dc.subject.other	Magnetic moments	en
dc.subject.other	Magnetite	en
dc.subject.other	Magnetization	en
dc.subject.other	Microstructure	en
dc.subject.other	Monte Carlo methods	en
dc.subject.other	Particle size analysis	en
dc.subject.other	Permittivity	en
dc.subject.other	Surface active agents	en
dc.subject.other	Transmission electron microscopy	en
dc.subject.other	X ray scattering	en
dc.subject.other	Depolarization factor	en
dc.subject.other	Magnetodielectric effect	en
dc.subject.other	Mechanical stability	en
dc.subject.other	Nanostructured materials	en
dc.title	Microstructure and effective properties of nanocomposites: Ferrofluids as tunable model systems	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1088/0022-3727/37/3/001	en
heal.identifier.secondary	http://dx.doi.org/10.1088/0022-3727/37/3/001	en
heal.publicationDate	2004	en
heal.abstract	We have studied the correlation between microstructure and effective material properties using colloidal dispersions of magnetic nanoparticles in a carrier liquid (ferrofluids). Their microstructure can be altered in a continuous and reversible way via an external magnetic field. Two-dimensional small angle x-ray scattering and Monte Carlo simulations show that field-induced structural anisotropy develops due to the formation of anisometric particle clusters having a preferred orientation parallel to the field. In this polydisperse system particles of all sizes take part in cluster formation. The structural data are compared with results of dielectric measurements in the frequency range from 5 Hz to 1 GHz. We show that dielectric anisotropy is correlated with the shape anisometry of oriented clusters.	en
heal.journalName	Journal of Physics D: Applied Physics	en
dc.identifier.doi	10.1088/0022-3727/37/3/001	en
dc.identifier.volume	37	en
dc.identifier.issue	3	en
dc.identifier.spage	307	en
dc.identifier.epage	317	en