Active phase separation in mixtures of chemically-interacting particles

EUROPEAN BIOPHYSICS JOURNAL WITH BIOPHYSICS LETTERS 48 (2019) S66-S66

Authors:

J Agudo-Canalejo, R Golestanian

Chemotaxis mediated interactions can stabilize the hydrodynamic instabilities in active suspensions

Soft Matter, 2019, 15, 3248-3255

Authors:

Mehrana Nejad, Ali Najafi

Abstract:

Ordered phases in active suspensions of polar swimmers are under long-wavelength hydrodynamic mediated instabilities. In this article, we show that chemical molecules dissolved in aqueous suspensions, as an unavoidable part of most wet active systems, can mediate long-range interactions and subsequently stabilize the polar phase. Chemoattractants in living suspensions and dissolved molecules in synthesized Janus suspensions are reminiscent of such chemical molecules. Communication between swimmers through the gradients of such chemicals is the foundation of this stabilization mechanism. To classify the stable states of such active systems, we investigate the detailed phase diagrams for two classes of systems with momentum conserving and non-conserving dynamics. Our linear stability analysis shows that the proposed stabilization mechanism can work for swimmers with different dynamical properties, e.g., pushers or pullers and with various static characteristics, e.g., spherical, oblate or prolate geometries.

Coarse-grained modelling of the structural properties of DNA origami

NUCLEIC ACIDS RESEARCH 47:3 (2019) 1585-1597

Authors:

Benedict EK Snodin, John S Schreck, Flavio Romano, Ard A Louis, Jonathan PK Doye

DNA Systems Under Internal and External Forcing An Exploration Using Coarse-Grained Modelling Supervisor's Foreword

Chapter in DNA SYSTEMS UNDER INTERNAL AND EXTERNAL FORCING: AN EXPLORATION USING COARSE-GRAINED MODELLING, (2019) VII-+

Identifying Physical Causes of Apparent Enhanced Cyclization of Short DNA Molecules with a Coarse-Grained Model

JOURNAL OF CHEMICAL THEORY AND COMPUTATION 15:8 (2019) 4660-4672

Authors:

Ryan M Harrison, Flavio Romano, Thomas E Ouldridge, Ard A Louis, Jonathan PK Doye