Kinetic control of the coverage of oil droplets by DNA-functionalised colloids

We report a study of reversible adsorption of DNA-coated colloids on complementary functionalized oil droplets. We show that it is possible to control the surface coverage of oil droplets by colloidal particles, by exploiting the fact that during slow adsorption, compositional arrest takes place wel...

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Bibliographic Details
Published in:arXiv.org 2016-03
Main Authors: Joshi, Darshana, Bargteil, Dylan, Caciagli, Alessio, Burelbach, Jerome, Xing, Zhongyang, Nunes, André S, Pinto, Diogo E P, Araújo, Nuno A M, Bruijc, Jasna, Eiser, Erika
Format: Article
Language:English
Subjects:
Adsorption
Colloids
Computer simulation
Deoxyribonucleic acid
Depletion
DNA
Droplets
Ergodic processes
Loads (forces)
Repair & maintenance
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Summary:We report a study of reversible adsorption of DNA-coated colloids on complementary functionalized oil droplets. We show that it is possible to control the surface coverage of oil droplets by colloidal particles, by exploiting the fact that during slow adsorption, compositional arrest takes place well before structural arrest occurs. As a consequence, we can prepare colloid-coated oil droplets with a `frozen' degree of loading, but with fully ergodic colloidal dynamics on the droplets. We illustrate the equilibrium nature of the adsorbed colloidal phase by exploring the quasi two-dimensional (2d) phase behaviour of the adsorbed colloids under the influence of depletion interactions. We present simulations of a simple model that illustrates the nature of the compositional arrest and the structural ergodicity.
ISSN:2331-8422
DOI:10.48550/arxiv.1603.05931