Inter-particle interactions in biocompatible magnetic fluids

Author

Bui, Q.-T. ; Pankhurst, Q.A. ; Zulqarnain, K.

Author_Institution

Dept. of Phys. & Astron., Univ. Coll. London, UK

Volume

34

Issue

4

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

2117

Lastpage

2119

Abstract

Biocompatible magnetic fluids intended for use in protein purification applications have been prepared and characterised. Superparamagnetic iron oxide particles of order 10 nm in diameter were made by co-precipitation of ferric and ferrous chlorides in NaOH solution and were subsequently coated with aminosilane and dispersed in water. The magnetic and structural properties of a series of dispersions were investigated via atomic force microscopy, dynamic light scattering and SQUID magnetometry. These results enabled the interpretation of zero-field cooled and initial magnetisation data in dilute dispersions in terms of superparamagnetic relaxation and inter-particle interactions

Keywords

iron compounds; magnetic fluids; magnetic particles; magnetisation; precipitation (physical chemistry); superparamagnetism; Fe₃O₄; NaOH solution; SQUID magnetometry; aminosilane coating; atomic force microscopy; biocompatible magnetic fluid; co-precipitation; dynamic light scattering; ferric chloride; ferrous chloride; initial magnetisation; interparticle interaction; iron oxide particles; magnetic properties; protein purification; structural properties; superparamagnetic relaxation; water dispersion; zero-field cooled magnetisation; Atomic force microscopy; Iron; Light scattering; Magnetic force microscopy; Magnetic liquids; Magnetic properties; Magnetization; Proteins; Purification; SQUIDs;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.706822

Filename

706822