Characterisation of Dynabeads® by magnetization measurements and Mossbauer spectroscopy

被引：253
作者：
Fonnum, G
Johansson, C
Molteberg, A
Morup, S
Aksnes, E
机构：
[1] Dynal Biotech ASA, N-309 Oslo, Norway
[2] IMEGO AB, SE-41133 Gothenburg, Sweden
[3] Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2005年 / 293卷 / 01期
关键词：
maghemite; nanoparticles; x-ray diffraction; SEM analysis; Mossbauer spectroscopy; magnetic measurements; crystallite size; magnetic mobility; dynabeads;
D O I：
10.1016/j.jmmm.2005.01.041
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
X-ray diffraction, SEM analysis, Mossbauer spectroscopy and magnetic measurements were used to characterize three different magnetic beads (Dynabeads((R))). Maghemite (gamma-Fe2O3) is the predominant crystalline phase. The nanoparticles were evenly spread in the beads, and the crystal sizes were in the range of 8 nm. The nanoparticles showed superparamagnetic behaviour. The particle's intrinsic magnetization of about 340 kA/m is typical for nanoparticles of maghemite. (c) 2005 Elsevier B.V. All rights reserved.
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页码：41 / 47
页数：7
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