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Steve Granick
첨단연성물질 연구단
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Effective temperature concept evaluated in an active colloid mixture

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Title
Effective temperature concept evaluated in an active colloid mixture
Author(s)
Ming Han; Jing Yan; Steve Granick; Erik Luijten
Publication Date
2017-07
Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-PHYSICAL SCIENCES, v.114, no.29, pp.7513 - 7518
Publisher
NATL ACAD SCIENCES
Abstract
Thermal energy agitates all matter, and its competition with ordering tendencies is a fundamental organizing principle in the physical world; this observation suggests that an effective temperature might emerge when external energy input enhances agitation. However, despite the repeated proposal of this concept based on kinetics for various nonequilibrium systems, the value of an effective temperature as a thermodynamic control parameter has been unclear. Here, we introduce a two-component system of driven Janus colloids, such that collisions induced by external energy sources agitate the system, and we demonstrate quantitative agreement with hallmarks of statistical thermodynamics for binary phase behavior: the archetypal phase diagram with equilibrium critical exponents, Gaussian displacement distributions, and even capillarity. The significance is to demonstrate a class of dynamical conditions under which thermodynamic analysis extends quantitatively to systems that are decidedly nonequilibrium except that the effective temperature differs from the physical temperature. © 2017, National Academy of Sciences. All rights reserved
URI
http://pr.ibs.re.kr/handle/8788114/3945
DOI
10.1073/pnas.1706702114
ISSN
0027-8424
Appears in Collections:
Center for Soft and Living Matter(첨단연성물질 연구단) > Journal Papers (저널논문)
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