From nanocrystals to nanorods: New iron oxide-silica nanocomposites from metallorganic precursors

被引：35

作者：

Corr, Serena A. ^{[1
]}

Gun'ko, Yurii K. ^{[1
]}

Douvalis, Alexios P. ^{[2
,3
]}

Venkatesan, Munuswamy ^{[4
]}

Gunning, Robert D. ^{[4
]}

Nellist, Peter D. ^{[5
]}

机构：

[1] Univ Dublin, Trinity Coll, Sch Chem, Dublin 2, Ireland

[2] Univ Ioannina, Dept Mat Sci & Engn, GR-45110 Ioannina, Greece

[3] Univ Ioannina, Dept Phys, GR-45110 Ioannina, Greece

[4] Univ Dublin, Trinity Coll, Sch Phys, Dublin 2, Ireland

[5] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 04期

关键词：

D O I：

10.1021/jp076871d

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Sol-gel one-step processing of the Fe(II) alkoxide [Fe(OBUt)(2)(THF)](2) and tetraethyl orthosilicate (TEOS) at various ratios afforded new silica-iron oxide magnetic nanocomposite materials, ranging in shape from nanocrystals to nanorods depending on the percentage of TEOS added. The nanocomposites have been investigated by Fourier transform infrared and Raman spectroscopy, X-ray diffraction, Fe-57 Mossbauer spectroscopy, magnetization measurements, transmission electron microscopy, scanning transmission electron microscopy, and energy dispersive X-ray analysis. These silica-coated magnetic materials might have a range of potential applications in biotechnology, medicine (e.g., as magnetic fluids for MRI), catalysis, and magnetic storage.

引用

页码：1008 / 1018

页数：11

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