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Issue 48, 2016
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Discontinous change from thermally- to geometrically-dominated effective interactions in colloidal solutions

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Abstract

We report numerical results for the effective potential arising between two colloids immersed in a self-assembling cosolute which forms reversible clusters. The potential is evaluated at cosolute state points with different densities and temperatures but with the same connectivity properties. We find that the range of the resulting effective potential is controlled only by the cosolute thermal correlation length rather than by its connectivity length. We discuss the significant differences from previous results focusing on the cosolute forming irreversible clusters and we show that the irreversible bond case represents a singular limit which cannot be accessed in equilibrium by continuously increasing the bond lifetime.

Graphical abstract: Discontinous change from thermally- to geometrically-dominated effective interactions in colloidal solutions

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Article information


Submitted
13 Aug 2016
Accepted
10 Nov 2016
First published
10 Nov 2016

Soft Matter, 2016,12, 9649-9656
Article type
Paper

Discontinous change from thermally- to geometrically-dominated effective interactions in colloidal solutions

N. Gnan, F. Sciortino and E. Zaccarelli, Soft Matter, 2016, 12, 9649
DOI: 10.1039/C6SM01872F

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