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Magnetic response of thermally blocked magnetic nanoparticles in a pulsed magnetic field
RISE, Swedish ICT, Acreo.
RISE, Swedish ICT, Acreo.ORCID iD: 0000-0003-0792-7039
RISE, Swedish ICT, Acreo.
RISE, Swedish ICT, Acreo.
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2007 (English)In: Journal of Magnetism and Magnetic Materials, ISSN 0304-8853, E-ISSN 1873-4766, Vol. 311, no 1, p. 166-70Article in journal (Refereed) Published
Abstract [en]

In order to detect fast changes of the Brownian relaxation time due to reaction kinetics on the surface of magnetic particles or particle-clustering processes, we have developed a method that uses pulsed magnetic fields and detects the relaxation of the magnetic response on the time scale of milliseconds. We compared measurements in the frequency domain with the time domain measurement using particle suspensions with three different median sizes. The results obtained with the two methods agreed well. Time domain determination of Brownian relaxation was then used to study the reaction kinetics of the clustering process when sodium chloride solution was added to a magnetic nanoparticle suspension.

Place, publisher, year, edition, pages
2007. Vol. 311, no 1, p. 166-70
Keywords [en]
magnetic nanoparticles, AC susceptometry, bio-sensors
National Category
Computer and Information Sciences
Identifiers
URN: urn:nbn:se:ri:diva-32150DOI: 10.1016/j.jmmm.2006.10.1182Scopus ID: 2-s2.0-33947157142OAI: oai:DiVA.org:ri-32150DiVA, id: diva2:1152009
Available from: 2017-10-24 Created: 2017-10-24 Last updated: 2019-10-17Bibliographically approved

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Jonasson, ChristianIlver, DagJohansson, Christer

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