How temperature determines formation of maghemite nanoparticles

被引：28

作者：

Girod, Matthias ^{[1
]}

Vogel, Stefanie ^{[1
]}

Szczerba, Wojciech ^{[1
]}

Thuenemann, Andreas F. ^{[1
]}

机构：

[1] BAM Fed Inst Mat Res & Testing, D-12205 Berlin, Germany

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2015年 / 380卷

关键词：

Iron Oxide Nanoparticles; Micromixer; SAXS; XANES; Carboxydextran; HYPERTHERMIA; CANCER;

D O I：

10.1016/j.jmmm.2014.09.057

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the formation of polymer-stabilized superparamagnetic single-core and multi-core maghemite nanoparticles. The particle formation was carried out by coprecipitation of Fe(II) and Fe(III) sulfate in a continuous aqueous process using a micromixer system. Aggregates containing 50 primary particles with sizes of 2 nm were formed at a reaction temperature of 30 degrees C. These particles aggregated further with time and were not stable. In contrast, stable single-core particles with a diameter of 7 nm were formed at 80 degrees C as revealed by small-angle X-ray scattering (SAXS) coupled in-line with the micromixer for particle characterization. X-ray diffraction and TEM confirmed the SAXS results. X-ray absorption near-edge structure spectroscopy (XANES) identified the iron oxide phase as maghemite. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：163 / 167

页数：5

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