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Issue 20, 2018
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Hunting mermaids in real space: known knowns, known unknowns and unknown unknowns

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Abstract

We review efforts to realise so-called mermaid (or short-ranged attraction/long ranged repulsion) interactions in 3d real space. The repulsive and attractive contributions to these interactions in charged colloids and colloid–polymer mixtures, may be accurately realised, by comparing particle-resolved studies with colloids to computer simulation. However, when we review work where these interactions have been combined, despite early indications of behaviour consistent with predictions, closer analysis reveals that in the non-aqueous systems used for particle-resolved studies, the idea of summing the attractive and repulsive components leads to wild deviations with experiment. We suggest that the origin lies in the weak ion dissociation in these systems with low dielectric constant solvents. Ultimately this leads even to non-centro-symmetric interactions and a new level of complexity in these systems.

Graphical abstract: Hunting mermaids in real space: known knowns, known unknowns and unknown unknowns

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Publication details

The article was received on 28 Feb 2018, accepted on 02 May 2018 and first published on 02 May 2018


Article type: Review Article
DOI: 10.1039/C8SM00400E
Citation: Soft Matter, 2018,14, 4020-4028
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    Hunting mermaids in real space: known knowns, known unknowns and unknown unknowns

    C. P. Royall, Soft Matter, 2018, 14, 4020
    DOI: 10.1039/C8SM00400E

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