Magnetic properties and morphology of block copolymer-cobalt oxide nanocomposites

被引：47

作者：

Ahmed, SR ^{[1
]}

Kofinas, P ^{[1
]}

机构：

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

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2005年 / 288卷

基金：

美国国家科学基金会;

关键词：

block copolymer; Co3O4; ferromagnetic; nanoparticles;

D O I：

10.1016/j.jmmm.2004.09.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The morphology and magnetic properties of diblock copolymer templated ferrimagnetic cobalt oxide nanoparticles are reported. Ring opening metathesis polymerization (ROMP) was used to synthesize a novel cobalt diblock copolymer, where cobalt is directly attached to the polymer chain. Gel permeation chromatography (GPC) was performed to determine molecular weight distribution. Transmission electron microscope (TEM), UV-Vis, FTIR, and vibrating sample magnetometer (VSM) were used to characterize the block copolymer nanocomposite. The nanocomposite films were weakly ferrimagnetic at room temperature. The cobalt oxide nanoparticles were uniformly dispersed within the polymer matrix with an average radius of 4.9 +/- 0.9 nm. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：219 / 223

页数：5

共 11 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] Synthesis of an A/B/C triblock copolymer for battery materials applications [J].

Bullock, SE ;

Kofinas, P .

MACROMOLECULES, 2004, 37 (05) :1783-1786

[4] Synthesis of metal nanoclusters within microphase-separated diblock copolymers: sodium carboxylate vs carboxylic acid functionalization [J].

Clay, RT ;

Cohen, RE .

SUPRAMOLECULAR SCIENCE, 1998, 5 (1-2) :41-48

[5]

Figgis B. N., 1996, INTRO LIGAND FIELDS

[6]

KOBAYASHI T, 1990, P 3 INT M CHEM SENS, P318

[7] Electrochromic properties of cobalt oxide thin films prepared by chemical vapor deposition [J].

Maruyama, T ;

Arai, S .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (04) :1383-1386

[8] Enhancement of surface areas of Co3O4 and NiCo2O4 electrocatalysts prepared by spray pyrolysis [J].

Nkeng, P ;

Koenig, JF ;

Gautier, JL ;

Chartier, P ;

Poillerat, G .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1996, 402 (1-2) :81-89

[9] Processible optically transparent block copolymer films containing superparamagnetic iron oxide nanoclusters [J].

Sohn, BH ;

Cohen, RE .

CHEMISTRY OF MATERIALS, 1997, 9 (01) :264-269

[10] Structural and spectroelectrochemical investigations of sol-gel derived electrochromic spinel Co3O4 films [J].

Svegl, F ;

Orel, B ;

Hutchins, MG ;

Kalcher, K .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (05) :1532-1539

← 1 2 →