Zero-field birefringence of biocompatible magnetic fluids:: A concentration dependence investigation

被引：10

作者：

Elói, MTA

Azevedo, RB

Lima, ECD

Pimenta, CM

Morais, PC ^{[1
]}

机构：

[1] Univ Brasilia, Inst Fis, BR-7919970 Brasilia, DF, Brazil

[2] Univ Brasilia, Inst Ciencias Biol, Dept Genet & Morfol, BR-70910900 Brasilia, DF, Brazil

[3] Univ Fed Goias, Inst Quim, BR-74001 Goiania, Go, Brazil

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2005年 / 293卷 / 01期

关键词：

biocompatibility; biocompatible magnetic fluids; maghemite; zero-field birefringence; citrate; sample dilution effect; magnetite; nanoparticles;

D O I：

10.1016/j.jmmm.2005.02.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Zero-field birefringence was used to investigate maghemite-based biocompatible magnetic fluids surface-coated with citrate. The model used to analyze the birefringence signal considers the dipolar magnetic interaction among dimers and the onset of a nematic phase near the sample holder surface. The data show that zero-field birefringence grows with sample dilution. (c) 2005 Elsevier B.V. All rights reserved.

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收藏

页码：220 / 223

页数：4

相关论文

共 14 条

[1] Zero-field birefringence in magnetic fluids: Temperature, particle size, and concentration dependence [J].

Bakuzis, AF ;

Da Silva, MF ;

Morais, PC ;

Olavo, LSF ;

Neto, KS .

JOURNAL OF APPLIED PHYSICS, 2000, 87 (05) :2497-2502

[2] Irreversibility of zero-field birefringence in ferrofluids upon temperature reversal [J].

Bakuzis, AF ;

Da Silva, MF ;

Morais, PC ;

Neto, KS .

JOURNAL OF APPLIED PHYSICS, 2000, 87 (05) :2307-2311

[3] Direct observation of dipolar chains in iron ferrofluids by cryogenic electron microscopy [J].

Butter, K ;

Bomans, PHH ;

Frederik, PM ;

Vroege, GJ ;

Philipse, AP .

NATURE MATERIALS, 2003, 2 (02) :88-91

[4]

DEGENNES PG, 1970, PHYS KONDENS MATER, V11, P189

[5] Structural analogy between aqueous and oily magnetic fluids [J].

Dubois, E ;

Cabuil, V ;

Boué, F ;

Perzynski, R .

JOURNAL OF CHEMICAL PHYSICS, 1999, 111 (15) :7147-7160

[6] Biocompatible magnetic fluids: a comparative birefringence investigation [J].

Gravina, PP ;

Santos, JS ;

Figueiredo, LC ;

Neto, KS ;

Da Silva, MF ;

Buske, N ;

Gansau, C ;

Morais, PC .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2002, 252 (1-3) :393-395

[7]

Halbreich A, 1997, SCIENTIFIC AND CLINICAL APPLICATIONS OF MAGNETIC CARRIERS, P399

[8] Synthesis and characterization of nanometer-size Fe3O4 and gamma-Fe2O3 particles [J].

Kang, YS ;

Risbud, S ;

Rabolt, JF ;

Stroeve, P .

CHEMISTRY OF MATERIALS, 1996, 8 (09) :2209-&

[9] Toxic effects of ionic magnetic fluids in mice [J].

Lacava, ZGM ;

Azevedo, RB ;

Lacava, LM ;

Martins, EV ;

Garcia, VAP ;

Rébula, CA ;

Lemos, APC ;

Sousa, MH ;

Tourinho, FA ;

Morais, PC ;

Da Silva, MF .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 194 (1-3) :90-95

[10] Biological effects of magnetic fluids:: toxicity studies [J].

Lacava, ZGM ;

Azevedo, RB ;

Martins, EV ;

Lacava, LM ;

Freitas, MLL ;

Garcia, VAP ;

Rébula, CA ;

Lemos, APC ;

Sousa, MH ;

Tourinho, FA ;

Da Silva, MF ;

Morais, PC .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 201 :431-434