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Published December 2017 | Submitted + Published + Supplemental Material
Journal Article Open

Antiswarming: Structure and dynamics of repulsive chemically active particles


Chemically active Brownian particles with surface catalytic reactions may repel each other due to diffusiophoretic interactions in the reaction and product concentration fields. The system behavior can be described by a "chemical" coupling parameter Γ_c that compares the strength of diffusiophoretic repulsion to Brownian motion, and by a mapping to the classical electrostatic one component plasma (OCP) system. When confined to a constant-volume domain, body-centered cubic (bcc) crystals spontaneously form from random initial configurations when the repulsion is strong enough to overcome Brownian motion. Face-centered cubic (fcc) crystals may also be stable. The "melting point" of the "liquid-to-crystal transition" occurs at Γ_c ≈ 140 for both bcc and fcc lattices.

Additional Information

© 2017 American Physical Society. Received 19 August 2017; published 1 December 2017. We thank Professor Z.-G. Wang for bringing our attention to the repulsive system. This work is supported by NSF CBET-1437570.

Attached Files

Published - PhysRevE.96.060601.pdf

Submitted - 1711.01446.pdf

Supplemental Material - SinkFreezeP864B30Da2SDnew90Gamma220_small.mp4

Supplemental Material - SinkMeltP686B35Da5SDnew84Gamma110_small.mp4


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August 19, 2023
October 17, 2023