Condensed Matter Theory

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Modelling receding contact lines on superhydrophobic surfaces

(2010)

Authors:

BM Mognetti, JM Yeomans
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Structural, mechanical and thermodynamic properties of a coarse-grained DNA model

(2010)

Authors:

Thomas E Ouldridge, Ard A Louis, Jonathan PK Doye
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Ising Deconfinement Transition Between Feshbach-Resonant Superfluids

(2010)

Authors:

S Ejima, MJ Bhaseen, M Hohenadler, FHL Essler, H Fehske, BD Simons
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Lévy Fluctuations and Tracer Diffusion in Dilute Suspensions of Algae and Bacteria

(2010)

Authors:

Irwin M Zaid, Jörn Dunkel, Julia M Yeomans
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Pattern formation in colloidal explosions

ArXiv 1009.193 (2010)

Authors:

Arthur V Straube, Ard A Louis, Jörg Baumgartl, Clemens Bechinger, Roel PA Dullens

Abstract:

We study the non-equilibrium pattern formation that emerges when magnetically repelling colloids, trapped by optical tweezers, are abruptly released, forming colloidal explosions. For multiple colloids in a single trap we observe a pattern of expanding concentric rings. For colloids individually trapped in a line, we observe explosions with a zigzag pattern that persists even when magnetic interactions are much weaker than those that break the linear symmetry in equilibrium. Theory and computer simulations quantitatively describe these phenomena both in and out of equilibrium. An analysis of the mode spectrum allows us to accurately quantify the non-harmonic nature of the optical traps. Colloidal explosions provide a new way to generate well-characterized non-equilibrium behaviour in colloidal systems.
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