Unusual Features of Depletion Interactions in Soft Polymer-Based Colloids Mixed with Linear Homopolymers

Autor(en)

Manuel Camargo, Christos Likos

Abstrakt

We investigate the influence of the addition of polymer chains on the effective interaction between star polymers, as a model for the depletion potential in ultrasoft mixtures. The effects of size ratio and chain polymer concentration on the chain-modified star-star interactions at good (athermal) solvent conditions are investigated. For both hard sphere mixtures and colloid-nonadsorbing polymer mixtures the range of the depletion interaction increases with the size ratio. For the systems at hand, the range of the depletion potential is insensitive to the size of the depletant polymer. The physical origin of this and the associated effects, as well as a mapping of the mixtures onto a one-component system, are discusssed.

Organisation(en)

Computergestützte Physik und Physik der Weichen Materie

Externe Organisation(en)

Heinrich-Heine-Universität Düsseldorf

Journal

Physical Review Letters

Band

104

Anzahl der Seiten

4

ISSN

0031-9007

DOI

https://doi.org/10.1103/PhysRevLett.104.078301

Publikationsdatum

2010

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/d2517897-5437-433d-8909-ae9884e83e25