Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1804174 | Journal of Magnetism and Magnetic Materials | 2007 | 5 Pages |
Abstract
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.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Andrea Prieto Astalan, Christian Jonasson, Karolina Petersson, Jakob Blomgren, Dag Ilver, Anatol Krozer, Christer Johansson,