Berlin 2012 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 34: Colloids and Complex Liquids II

CPP 34.7: Talk

Thursday, March 29, 2012, 17:00–17:15, C 130

Predicting DNA-mediated colloidal interactions with a simple self-consistent mean-field model — •Stefano Angioletti-Uberti, Bortolo Mognetti, Patrick Varilly, and Daan Frenkel — Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, UK

We present a general model able to describe with semi-quantitative accuracy the interaction energy between micron-sized DNA coated colloids (DNACCs). The generality of this theory, based on a self-consistent mean-field approach, allows to treat under the same unifying framework arbitrary mixtures of DNACCs functionalized with various types of DNA-based constructs and nucleotides sequences. We compare our theory with full numerical results from Monte Carlo simulations and we discuss in-depth the thermodynamic consistency of our approach, paying attention to highlight the assumptions in our model and possible ways to relax them. It is expected that the present theory will provide a usefull tool for fast, off-the-shelf calculations of DNA-coated colloids interactions.