Influence of structure of iron nanoparticles in aggregates on their magnetic properties

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dc.contributor.authorRosická, Dana
dc.contributor.authorŠembera, Jan
dc.date.accessioned2016-05-24
dc.date.available2016-05-24
dc.date.issued2011
dc.description.abstractZero-valent iron nanoparticles rapidly aggregate. One of the reasons is magnetic forces among the nanoparticles. Magnetic field around particles is caused by composition of the particles. Their core is formed from zero-valent iron, and shell is a layer of magnetite. The magnetic forces contribute to attractive forces among the nanoparticles and that leads to increasing of aggregation of the nanoparticles. This effect is undesirable for decreasing of remediation properties of iron particles and limited transport possibilities. The aggregation of iron nanoparticles was established for consequent processes: Brownian motion, sedimentation, velocity gradient of fluid around particles and electrostatic forces. In our previous work, an introduction of influence of magnetic forces among particles on the aggregation was presented. These forces have significant impact on the rate of aggregation. In this article, a numerical computation of magnetic forces between an aggregate and a nanoparticle and between two aggregates is shown. It is done for random position of nanoparticles in an aggregate and random or arranged directions of magnetic polarizations and for structured aggregates with arranged vectors of polarizations. Statistical computation by Monte Carlo is done, and range of dominant area of magnetic forces around particles is assessed. © 2011 Rosická and Šembera.en
dc.formattext
dc.identifier.doi10.1186/1556-276x-6-527
dc.identifier.issn1931-7573
dc.identifier.scopus2-s2.0-84856050124
dc.identifier.urihttps://dspace.tul.cz/handle/15240/16342
dc.identifier.urihttps://nanoscalereslett.springeropen.com/articles/10.1186/1556-276X-6-527
dc.language.isoen
dc.publisherTechnická Univerzita v Libercics
dc.publisherTechnical university of Liberec, Czech Republicen
dc.relation.ispartofNanoscale Research Lettersen
dc.sourcej-scopus
dc.sourcej-wok
dc.subjectaggregationen
dc.subjectIron nanoparticlesen
dc.subjectMagnetic forcesen
dc.subjectStructure of aggregatesen
dc.titleInfluence of structure of iron nanoparticles in aggregates on their magnetic propertiesen
dc.typeArticle
local.accessοpen
local.citation.epage9
local.citation.spage1
local.departmentInstitute of Novel Technologies and Applied Informatics
local.facultyFaculty of Mechatronics, Informatics and Interdisciplinary Studies
local.fulltextyes
local.identifier.stagRIV/46747885:24220/11:#0001831
local.identifier.wok296260000001
local.relation.volume6
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