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Forces, Stresses and the (Thermo?) Dynamics of Active Matter

Takatori, Sho C. and Brady, John F. (2016) Forces, Stresses and the (Thermo?) Dynamics of Active Matter. Current Opinion in Colloid and Interface Science, 21 . pp. 24-33. ISSN 1359-0294. doi:10.1016/j.cocis.2015.12.003.

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The statistical mechanics and microhydrodynamics of active matter systems have been studied intensively during the past several years, by various soft matter physicists, chemists, engineers, and biologists around the world. Recent attention has focused on the fascinating nonequilibrium behaviors of active matter that cannot be observed in equilibrium thermodynamic systems, such as spontaneous collective motion and swarming. Even minimal kinetic models of active Brownian particles exhibit self-assembly that resembles a gas–liquid phase separation from classical equilibrium systems. Self-propulsion allows active systems to generate internal stresses that enable them to control and direct their own behavior and that of their surroundings. In this Review we discuss the forces that govern the motion of active Brownian microswimmers, the stress (or pressure) they generate, and the implication of these concepts on their collective behavior. We focus on recent work involving the unique ‘swim pressure’ exerted by active systems, and discuss how this perspective may be the basic underlying physical mechanism responsible for self-assembly and pattern formation in all active matter. We discuss the utility of the swim pressure concept to quantify the forces, stresses, and the (thermo?) dynamics of active matter.

Item Type:Article
Related URLs:
URLURL TypeDescription
Takatori, Sho C.0000-0002-7839-3399
Brady, John F.0000-0001-5817-9128
Additional Information:© 2015 Elsevier Ltd. Received 13 December 2015, Revised 22 December 2015, Accepted 23 December 2015, Available online 6 January 2016.
Subject Keywords:active matter; swim pressure; nonequilibrium systems; collective behavior
Record Number:CaltechAUTHORS:20160119-095455048
Persistent URL:
Official Citation:Sho C. Takatori, John F. Brady, Forces, stresses and the (thermo?) dynamics of active matter, Current Opinion in Colloid & Interface Science, Volume 21, February 2016, Pages 24-33, ISSN 1359-0294, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63759
Deposited By: Tony Diaz
Deposited On:19 Jan 2016 23:01
Last Modified:10 Nov 2021 23:21

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