DocumentCode
791413
Title
Magnetic properties and morphology of block copolymer templated ferrimagnetic CoFe2O4 nanoparticles
Author
Ahmed, Sufi R. ; Ogale, Satish B. ; Kofinas, Peter
Author_Institution
Dept. of Mater. & Nucl. Eng., Univ. of Maryland, College Park, MD, USA
Volume
39
Issue
5
fYear
2003
Firstpage
2198
Lastpage
2200
Abstract
We synthesized the block copolymer of poly(norbornene-dicarboxcylic acid) and poly(norbornene) at room temperature, using ring opening metathesis polymerization. We then templated the CoFe2O4 nanoparticles within the polymer matrix, utilizing the self-assembled nature of the block copolymer. We used transmission electron microscopy, superconducting quantum interference device magnetometry, and X-ray powder diffraction to investigate the morphology and magnetic properties of the nanocomposites. The nanocomposite films are ferrimagnetic at room temperature. The CoFe2O4 nanoparticles are spherical and have an average radius of 8.7±0.4 nm. The nanoparticles are uniformly distributed within the polymer matrix with a nanoparticle density of 1109 particles/cm2.
Keywords
X-ray diffraction; cobalt compounds; coercive force; ferrites; magnetic thin films; magnetisation; nanocomposites; nanoparticles; polymer blends; polymerisation; remanence; self-assembly; transmission electron microscopy; 8.7 nm; CoFe2O4; X-ray powder diffraction; block copolymer templated ferrimagnetic CoFe2O4 nanoparticles; coercivity; ferrimagnetic films; magnetic properties; magnetization; morphology; nanocomposite films; nanoparticle density; poly(norbornene-dicarboxcylic acid) poly(norbornene) block copolymer; polymer matrix; remanence; ring opening metathesis polymerization; room temperature synthesis; self-assembled nature; spherical nanoparticles; superconducting quantum interference device magnetometry; transmission electron microscopy; uniform distribution; Ferrimagnetic films; Ferrimagnetic materials; Magnetic properties; Morphology; Nanocomposites; Nanoparticles; Polymers; Self-assembly; Superconducting films; Temperature;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/TMAG.2003.817074
Filename
1233435
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