Jump to main content
Jump to site search

Volume 181, 2015
Previous Article Next Article

Concentrated assemblies of magnetic nanoparticles in ionic liquids

Author affiliations


Maghemite (γ-Fe2O3) nanoparticles (NPs) can be successfully dispersed in a protic ionic liquid, ethylammonium nitrate (EAN), by transfer from aqueous dispersions into EAN. As the aqueous systems are well controlled, several parameters can be tuned. Their crucial role towards the interparticle potential and the structure of the dispersions is evidenced: (i) the size of the NPs tunes the interparticle attraction monitoring dispersions to be either monophasic or gas–liquid-like phase separated; (ii) the nature of the initial counterion in water (here sodium, lithium or ethylammonium) and the amount of added water (<20 vol%) modulate the interparticle repulsion. Very concentrated dispersions with a volume fraction of around 25% are obtained thanks to the gas–liquid-like phase separations. Such conclusions are derived from a fine structural and dynamical study of the dispersions on a large range of spatial scales by coupling several techniques: chemical analyses, optical microscopy, dynamic light scattering, magneto-optic birefringence and small angle scattering.

Back to tab navigation

Supplementary files

Publication details

The article was received on 09 Feb 2015, accepted on 16 Feb 2015 and first published on 17 Feb 2015

Article type: Paper
DOI: 10.1039/C5FD00019J
Author version
Download author version (PDF)
Faraday Discuss., 2015,181, 193-209

  •   Request permissions

    Concentrated assemblies of magnetic nanoparticles in ionic liquids

    M. Mamusa, J. Sirieix-Plénet, R. Perzynski, F. Cousin, E. Dubois and V. Peyre, Faraday Discuss., 2015, 181, 193
    DOI: 10.1039/C5FD00019J

Search articles by author