http://www.cnr.it/ontology/cnr/individuo/prodotto/ID291288
How soft repulsion enhances the depletion mechanism (Articolo in rivista)
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- Label
- How soft repulsion enhances the depletion mechanism (Articolo in rivista) (literal)
- Anno
- 2015-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1039/C4SM02218A (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Lorenzo Rovigatti (a,b); Nicoletta Gnan (c); Alberto Parola (d); Emanuela Zaccarelli (c,b) (literal)
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- First published on the web 12th November 2014. (literal)
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- http://pubs.rsc.org/en/content/articlehtml/2015/sm/c4sm02218a (literal)
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- (a) Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria
(b) Dipartimento di Fisica, Sapienza Università di Roma, Piazzale A. Moro 2, 00185 Roma, Italy
(c) CNR-ISC, Uos Sapienza, Piazzale A. Moro 2, 00185 Roma, Italy
(d) Dipartimento di Scienza e Alta Tecnologia, Università dell'Insubria, Via Valleggio 11, 22100 Como, Italy (literal)
- Titolo
- How soft repulsion enhances the depletion mechanism (literal)
- Abstract
- We investigate binary mixtures of large colloids interacting through soft potentials with small, ideal depletants. We show that softness has a dramatic effect on the resulting colloid-colloid effective potential when the depletant-to-colloid size ratio q is small, with significant consequences on the colloidal phase behaviour. We provide an exact relationship that allows us to obtain the effective pair potential for any type of colloid-depletant interaction in the case of ideal depletants, without having to rely on complicated and expensive full-mixture simulations. We also show that soft repulsion among depletants further enhances the tendency of colloids to aggregate. Our theoretical and numerical results demonstrate that - in the limit of small q - soft mixtures cannot be mapped onto hard systems and hence soft depletion is not a mere extension of the widely used Asakura-Oosawa potential. (literal)
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