Magnetic response of thermally blocked magnetic nanoparticles in a pulsed magnetic field

被引：33

作者：

Astalan, Andrea Prieto ^{[1
]}

Jonasson, Christian ^{[1
]}

Petersson, Karolina ^{[1
]}

Blomgren, Jakob ^{[1
]}

Ilver, Dag ^{[1
]}

Krozer, Anatol ^{[1
]}

Johansson, Christer ^{[1
]}

机构：

[1] Imego AB, S-41133 Gothenburg, Sweden

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 311卷 / 01期

关键词：

magnetic nanoparticles; Brownian relaxation; biosensor system; dynamic magnetic measurements; relaxometry;

D O I：

10.1016/j.jmmm.2006.10.1182

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：166 / 170

页数：5

共 11 条

[1] Biomolecular reactions studied using changes in Brownian rotation dynamics of magnetic particles [J].