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Issue 1, 2011
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Non-linear response of dipolar colloidal gels to external fields

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Abstract

Dipolar colloids can be made to gel by forming a reversible but persistent network of chain-like aggregates at very low volume fractions. Using the model of charged soft dumbbells in molecular dynamics simulations, we find that, under the effect of an external electric field, this gel displays a highly non-linear dielectrical susceptibility. We show that the latter is caused by a switch from a network to a structure of bundling chains when the field is strong enough. Such dramatic structural transformation upon applying external fields could allow to control the mechanical and dielectric response of these complex fluids, pointing to new applications of dipolar colloids as smart materials.

Graphical abstract: Non-linear response of dipolar colloidal gels to external fields

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Publication details

The article was received on 29 Jun 2010, accepted on 07 Sep 2010 and first published on 30 Sep 2010


Article type: Paper
DOI: 10.1039/C0SM00592D
Citation: Soft Matter, 2011,7, 163-171
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    Non-linear response of dipolar colloidal gels to external fields

    P. Ilg and E. Del Gado, Soft Matter, 2011, 7, 163
    DOI: 10.1039/C0SM00592D

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