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Influence of cluste...
Influence of clustering on the magnetic properties and hyperthermia performance of iron oxide nanoparticles
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- Bender, P. (author)
- University of Cantabria, Spain,Université du Luxembourg,University of Luxembourg,Universidad de Cantabria
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- Fock, J. (author)
- DTU Technical University of Denmark, Denmark,Danmarks Tekniske Universitet,Technical University of Denmark
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- Hansen, M. F. (author)
- DTU Technical University of Denmark, Denmark,Danmarks Tekniske Universitet,Technical University of Denmark
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- Bogart, L. K. (author)
- UCL University College London, UK,University College London (UCL)
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- Southern, P. (author)
- UCL University College London, UK,University College London (UCL)
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- Ludwig, F. (author)
- Technische Universität Braunschweig, Germany
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- Wiekhorst, F. (author)
- PTB Physikalisch-Technische Bundesanstalt, Germany,Physikalisch-Technische Bundesanstalt (PTB)
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- Szczerba, W. (author)
- Bundesanstalt für Materialforschung und -prüfung, Germany; AGH University of Science and Technology, Poland,Bundesanstalt für Materialforschung und -prüfung (BAM),Federal Institute for Materials Research and Testing,Akademia Gorniczo-Hutnicza im. Stanislawa Staszica w Krakowie,AGH University of Science and Technology
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- Zeng, Lunjie, 1983 (author)
- Chalmers University of Technology, Sweden,Chalmers tekniska högskola
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- Heinke, D. (author)
- nanoPET Pharma GmbH, Germany,Nanopet Pharma Gmbh
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- Gehrke, N. (author)
- nanoPET Pharma GmbH, Germany,Nanopet Pharma Gmbh
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- Díaz, M. T. F. (author)
- Institut Laue Langevin, France,Institut Laue-Langevin
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- González-Alonso, D. (author)
- University of Cantabria, Spain,Universidad de Cantabria
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- Espeso, J. I. (author)
- University of Cantabria, Spain,Universidad de Cantabria
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- Fernández, J. R. (author)
- University of Cantabria, Spain,Universidad de Cantabria
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- Johansson, Christer (author)
- RISE,Acreo,RISE Research Institutes of Sweden
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(creator_code:org_t)
- 2018-08-15
- 2018
- English.
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In: Nanotechnology. - : IOP Publishing. - 0957-4484 .- 1361-6528. ; 29:42
- Related links:
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https://backend.orbi...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- Clustering of magnetic nanoparticles can drastically change their collective magnetic properties, which in turn may influence their performance in technological or biomedical applications. Here, we investigate a commercial colloidal dispersion (FeraSpin™R), which contains dense clusters of iron oxide cores (mean size around 9 nm according to neutron diffraction) with varying cluster size (about 18-56 nm according to small angle x-ray diffraction), and its individual size fractions (FeraSpin™XS, S, M, L, XL, XXL). The magnetic properties of the colloids were characterized by isothermal magnetization, as well as frequency-dependent optomagnetic and AC susceptibility measurements. From these measurements we derive the underlying moment and relaxation frequency distributions, respectively. Analysis of the distributions shows that the clustering of the initially superparamagnetic cores leads to remanent magnetic moments within the large clusters. At frequencies below 105 rad s-1, the relaxation of the clusters is dominated by Brownian (rotation) relaxation. At higher frequencies, where Brownian relaxation is inhibited due to viscous friction, the clusters still show an appreciable magnetic relaxation due to internal moment relaxation within the clusters. As a result of the internal moment relaxation, the colloids with the large clusters (FS-L, XL, XXL) excel in magnetic hyperthermia experiments.
Subject headings
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- core-clusters
- magnetic hyperthermia
- magnetic nanoparticles
- multi-core particles
- nanoflowers
- numerical inversion
- Colloids
- Iron oxides
- Magnetic moments
- Magnetic susceptibility
- Medical applications
- Nanoparticles
- Neutron diffraction
- Magnetic nano-particles
- Multi core
- Nanomagnetics
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
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Bender, P.
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Fock, J.
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Hansen, M. F.
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Bogart, L. K.
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Southern, P.
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Ludwig, F.
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show more...
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Wiekhorst, F.
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Szczerba, W.
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Zeng, Lunjie, 19 ...
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Heinke, D.
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Gehrke, N.
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Díaz, M. T. F.
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González-Alonso, ...
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Espeso, J. I.
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Fernández, J. R.
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Johansson, Chris ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Inorganic Chemis ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Other Physics To ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
- Articles in the publication
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Nanotechnology
- By the university
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RISE
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Chalmers University of Technology