Magnetic properties and morphology of block copolymer templated ferrimagnetic CoFe2O4 nanoparticles

被引：13

作者：

Ahmed, SR ^{[1
]}

Ogale, SB

Kofinas, P

机构：

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

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

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

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2003年 / 39卷 / 05期

基金：

美国国家科学基金会;

关键词：

block copolymer; CoFe2O4; ferromagnetic; nanoparticle;

D O I：

10.1109/TMAG.2003.817074

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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 110(9) particles/cm(2).

引用

页码：2198 / 2200

页数：3

共 14 条

[1] Controlled room temperature synthesis of CoFe2O4 nanoparticles through a block copolymer nanoreactor route [J].

Ahmed, SR ;

Kofinas, P .

MACROMOLECULES, 2002, 35 (09) :3338-3341

[2] Magnetic properties of CoFe2O4 nanoparticles synthesized through a block copolymer nanoreactor route [J].

Ahmed, SR ;

Ogale, SB ;

Papaefthymiou, GC ;

Ramesh, R ;

Kofinas, P .

APPLIED PHYSICS LETTERS, 2002, 80 (09) :1616-1618

[3]

AHMED SR, UNPUB MACROMOLECULES

[4] Magnetic properties of nanophase CoFe2O4 particles [J].

Blaskov, V ;

Petkov, V ;

Rusanov, V ;

Martinez, LM ;

Martinez, B ;

Munoz, JS ;

Mikhov, M .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1996, 162 (2-3) :331-337

[5] NONCOLLINEAR SPIN ARRANGEMENT IN ULTRAFINE FERRIMAGNETIC CRYSTALLITES [J].

COEY, JMD .

PHYSICAL REVIEW LETTERS, 1971, 27 (17) :1140-+

[6] THE OBSERVATION OF MULTIAXIAL ANISOTROPY IN ULTRAFINE COBALT FERRITE PARTICLES USED IN MAGNETIC FLUIDS [J].

DAVIES, KJ ;

WELLS, S ;

UPADHYAY, RV ;

CHARLES, SW ;

OGRADY, K ;

ELHILO, M ;

MEAZ, T ;

MORUP, S .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1995, 149 (1-2) :14-18

[7] MAGNETIC-PROPERTIES OF MECHANICALLY ALLOYED COFE2O4 [J].

DING, J ;

MCCORMICK, PG ;

STREET, R .

SOLID STATE COMMUNICATIONS, 1995, 95 (01) :31-33

[8] Magnetic properties and Mossbauer spectra of nanosized CoFe2O4 powders [J].

Grigorova, M ;

Blythe, HJ ;

Blaskov, V ;

Rusanov, V ;

Petkov, V ;

Masheva, V ;

Nihtianova, D ;

Martinez, LM ;

Munoz, JS ;

Mikhov, M .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1998, 183 (1-2) :163-172

[9] NONCOLLINEAR MAGNETIC-STRUCTURE OF COFE2O4 SMALL PARTICLES [J].

HANEDA, K ;

MORRISH, AH .

JOURNAL OF APPLIED PHYSICS, 1988, 63 (08) :4258-4260

[10] Surface spin disorder in NiFe2O4 nanoparticles [J].

Kodama, RH ;

Berkowitz, AE ;

McNiff, EJ ;

Foner, S .

PHYSICAL REVIEW LETTERS, 1996, 77 (02) :394-397

← 1 2 →