Activity-Induced Phase Separation and Self-Assembly in Mixtures of Active and Passive Particles
(2015) In Physical Review Letters 114(Online 6 January 2015).- Abstract
- We investigate the phase behavior and kinetics of a monodisperse mixture of active (i.e., self-propelled) and passive isometric Brownian particles through Brownian dynamics simulations and theory. As in a purely active system, motility of the active component triggers phase separation into a dense and a dilute phase; in the dense phase we further find active-passive segregation, with "rafts" of passive particles in a "sea" of active particles. We find that phase separation from an initially disordered mixture can occur with as little as 15 percent of the particles being active. Finally, we show that a system prepared in a suitable fully segregated initial state reproducibly self-assembles an active "corona" which triggers crystallization... (More)
- We investigate the phase behavior and kinetics of a monodisperse mixture of active (i.e., self-propelled) and passive isometric Brownian particles through Brownian dynamics simulations and theory. As in a purely active system, motility of the active component triggers phase separation into a dense and a dilute phase; in the dense phase we further find active-passive segregation, with "rafts" of passive particles in a "sea" of active particles. We find that phase separation from an initially disordered mixture can occur with as little as 15 percent of the particles being active. Finally, we show that a system prepared in a suitable fully segregated initial state reproducibly self-assembles an active "corona" which triggers crystallization of the passive core by initiating a compression wave. Our findings are relevant to the experimental pursuit of directed self-assembly using active particles. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4924658
- author
- Stenhammar, Joakim LU ; Wittkowski, Raphael ; Marenduzzo, Davide and Cates, Michael E.
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Letters
- volume
- 114
- issue
- Online 6 January 2015
- article number
- 018301
- publisher
- American Physical Society
- external identifiers
-
- scopus:84921033865
- pmid:25615509
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.114.018301
- language
- English
- LU publication?
- yes
- id
- e3367f98-3e2e-45f6-b838-d0bd00e39304 (old id 4924658)
- alternative location
- http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.114.018301
- date added to LUP
- 2016-04-01 10:56:44
- date last changed
- 2022-04-20 07:21:13
@article{e3367f98-3e2e-45f6-b838-d0bd00e39304,
abstract = {{We investigate the phase behavior and kinetics of a monodisperse mixture of active (i.e., self-propelled) and passive isometric Brownian particles through Brownian dynamics simulations and theory. As in a purely active system, motility of the active component triggers phase separation into a dense and a dilute phase; in the dense phase we further find active-passive segregation, with "rafts" of passive particles in a "sea" of active particles. We find that phase separation from an initially disordered mixture can occur with as little as 15 percent of the particles being active. Finally, we show that a system prepared in a suitable fully segregated initial state reproducibly self-assembles an active "corona" which triggers crystallization of the passive core by initiating a compression wave. Our findings are relevant to the experimental pursuit of directed self-assembly using active particles.}},
author = {{Stenhammar, Joakim and Wittkowski, Raphael and Marenduzzo, Davide and Cates, Michael E.}},
issn = {{1079-7114}},
language = {{eng}},
number = {{Online 6 January 2015}},
publisher = {{American Physical Society}},
series = {{Physical Review Letters}},
title = {{Activity-Induced Phase Separation and Self-Assembly in Mixtures of Active and Passive Particles}},
url = {{https://lup.lub.lu.se/search/files/2260025/4924669.pdf}},
doi = {{10.1103/PhysRevLett.114.018301}},
volume = {{114}},
year = {{2015}},
}