Title :
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
fDate :
7/1/1998 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
