Interactions between Colloids Induced by a Soft Cross-Linked Polymer Substrate

Di Michele, Lorenzo and Yanagishima, Taiki and Brewer, Anthony R. and Kotar, Jurij and Eiser, Erika and Fraden, Seth (2011) Interactions between Colloids Induced by a Soft Cross-Linked Polymer Substrate. Physical Review Letters, 107 (13). p. 136101. DOI

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Using videomicroscopy imaging, we demonstrate the existence of a short-ranged equilibrium attraction between heavy silica colloids diffusing on soft surfaces of cross-linked polymer gels. The intercolloid potential can be tuned by changing the gel stiffness or by coating the colloids with a polymer layer. On sufficiently soft substrates, the interaction induced by the polymer matrix leads to large-scale colloidal aggregation. We correlate the in-plane interaction with a colloid-surface attraction.

Item Type: Article
Uncontrolled Keywords: 2011AREP; IA63;
Subjects: 99 - Other
Divisions: 99 - Other
Journal or Publication Title: Physical Review Letters
Volume: 107
Page Range: p. 136101
Identification Number:
Depositing User: Sarah Humbert
Date Deposited: 22 Oct 2011 14:00
Last Modified: 23 Jul 2013 10:02

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