Magnetic properties of CoFe2O4 nanoparticles synthesized through a block copolymer nanoreactor route

被引：102

作者：

Ahmed, SR

Ogale, SB

Papaefthymiou, GC

Ramesh, R

Kofinas, P ^{[1
]}

机构：

[1] Univ Maryland, Dept Chem Engn, College Pk, MD 20742 USA

[2] Univ Maryland, Dept Mat & Nucl Engn, College Pk, MD 20742 USA

[3] Villanova Univ, Dept Phys, Villanova, PA 19085 USA

[4] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

来源：

APPLIED PHYSICS LETTERS | 2002年 / 80卷 / 09期

关键词：

D O I：

10.1063/1.1456258

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The development of self-assembled magnetic CoFe2O4 nanoparticles within polymer matrices at room temperature is reported. Diblock copolymers consisting of poly (norbornene) and poly (norbornene-dicarboxcylic acid) (NOR/NORCOOH) were synthesized. The self-assembly of the mixed metal oxide within the NORCOOH block was achieved at room temperature by processing the copolymer nanocomposite using wet chemical methods. Morphology and magnetic properties were determined by superconducting quantum interference device magnetometry, transmission electron microscopy, wide angle x-ray diffraction, and Fe-57 Mossbauer spectroscopy. The CoFe2O4 nanoparticles are uniformly dispersed within the polymer matrix, and have an average radius of 4.8+/-1.4 nm. The nanocomposite films are superparamagnetic at room temperature and ferrimagnetic at 5 K. (C) 2002 American Institute of Physics.

引用

页码：1616 / 1618

页数：3