NMR studies into colloidal stability and magnetic order in fatty acid stabilised aqueous magnetic fluids

Ghosh, S., Carty, D., Clarke, S.P., Corr, S.A., Tekoriute, R., Gun'ko, Y.K. and Brougham, D.F. (2010) NMR studies into colloidal stability and magnetic order in fatty acid stabilised aqueous magnetic fluids. Physical Chemistry Chemical Physics, 12(42), pp. 14009-14016. (doi: 10.1039/C0CP00989J)

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Abstract

We report the physico-chemical characterisation of fatty acid stabilised aqueous magnetic fluids, which are ideal systems for studying the influence of nanoparticle aggregation on the emergent magnetic resonance properties of the suspensions. Stable colloids of superparamagnetic magnetite, Fe3O4, nanoparticle clusters in the 80 to 100 nm size range were produced by in situ nanoparticle growth and stabilisation, and by suspending pre-formed nanoparticles. NMR relaxation analysis shows that the magnetic resonance properties of the two types of suspension differ substantially and provides new insights into how the relaxation mechanisms are determined by the organisation of the nanoparticles within the clusters.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Corr, Professor Serena
Authors: Ghosh, S., Carty, D., Clarke, S.P., Corr, S.A., Tekoriute, R., Gun'ko, Y.K., and Brougham, D.F.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Physical Chemistry Chemical Physics
Publisher:Royal Society of Chemistry
ISSN:1463-9076
Published Online:05 October 2010

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