Structural and magnetic properties of nanoscale iron oxide particles synthesized in the presence of dextran or polyvinyl alcohol

被引：260
|
作者：
Pardoe, H
Chua-anusorn, W
St Pierre, TG [1 ]
Dobson, J
机构：
[1] Univ Western Australia, Dept Phys, Nedlands, WA 6907, Australia
[2] Keele Univ, Ctr Sci & Technol Med, Dept Biomed Engn & Med Phys, Stoke On Trent ST4 7QB, Staffs, England
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2001年 / 225卷 / 1-2期
关键词：
magnetite; maghemite; ferrofluids; dextran; polyvinyl alcohol; magnetic properties; nanoscale particles; synthesis; Mossbauer spectroscopy;
D O I：
10.1016/S0304-8853(00)01226-9
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Magnetite/maghemite nanoparticles were synthesized in the presence of either dextran or polyvinyl alcohol, yielding cluster- and necklace-like aggregates, respectively. Magnetization, Mossbauer spectroscopy, and microscopy measurements indicate that the arrangement of the particles within the aggregates affects the magnetic properties of the particles resulting in smaller particles in the clusters having higher superparamagnetic blocking temperatures than larger particles in the necklaces. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：41 / 46
页数：6
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