Characterisation of Dynabeads® by magnetization measurements and Mossbauer spectroscopy

被引：257

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.

引用

页码：41 / 47

页数：7

共 11 条

[1] MEASUREMENTS OF PARTICLE-SIZE DISTRIBUTION PARAMETERS IN FERROFLUIDS [J].