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Directed Self-Assembly of Polarizable Ellipsoids in an External Electric Field

Azari, Arash LU ; Crassous, Jérôme J. LU ; Mihut, Adriana M. LU ; Bialik, Erik LU ; Schurtenberger, Peter LU ; Stenhammar, Joakim LU and Linse, Per LU (2017) In Langmuir 33(48). p.13834-13840
Abstract
The interplay between shape anisotropy and directed long-range interactions enables the self-assembly of complex colloidal structures. As a recent highlight, ellipsoidal particles polarized in an external electric field were observed to associate into well-defined tubular structures. In this study, we systematically investigate such directed self-assembly using Monte Carlo simulations of a two-point-charge model of polarizable prolate ellipsoids. In spite of its simplicity and computational efficiency, we demonstrate that the model is capable of capturing the complex structures observed in experiments on ellipsoidal colloids at low volume fractions. We show that, at sufficiently high electric field strength, the anisotropy in shape and... (More)
The interplay between shape anisotropy and directed long-range interactions enables the self-assembly of complex colloidal structures. As a recent highlight, ellipsoidal particles polarized in an external electric field were observed to associate into well-defined tubular structures. In this study, we systematically investigate such directed self-assembly using Monte Carlo simulations of a two-point-charge model of polarizable prolate ellipsoids. In spite of its simplicity and computational efficiency, we demonstrate that the model is capable of capturing the complex structures observed in experiments on ellipsoidal colloids at low volume fractions. We show that, at sufficiently high electric field strength, the anisotropy in shape and electrostatic interactions causes a transition from three-dimensional crystal structures observed at low aspect ratios to two-dimensional sheets and tubes at higher aspect ratios. Our work thus illustrates the rich self-assembly behavior accessible when exploiting the interplay between competing long- and short-range anisotropic interactions in colloidal systems. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
33
issue
48
pages
13834 - 13840
publisher
The American Chemical Society
external identifiers
  • scopus:85037525568
  • wos:000416877600015
ISSN
0743-7463
DOI
10.1021/acs.langmuir.7b02040
language
English
LU publication?
yes
id
4be2027c-7bc2-4292-9fd7-972a0b4188be
date added to LUP
2017-11-28 11:35:41
date last changed
2018-06-10 05:25:03
@article{4be2027c-7bc2-4292-9fd7-972a0b4188be,
  abstract     = {The interplay between shape anisotropy and directed long-range interactions enables the self-assembly of complex colloidal structures. As a recent highlight, ellipsoidal particles polarized in an external electric field were observed to associate into well-defined tubular structures. In this study, we systematically investigate such directed self-assembly using Monte Carlo simulations of a two-point-charge model of polarizable prolate ellipsoids. In spite of its simplicity and computational efficiency, we demonstrate that the model is capable of capturing the complex structures observed in experiments on ellipsoidal colloids at low volume fractions. We show that, at sufficiently high electric field strength, the anisotropy in shape and electrostatic interactions causes a transition from three-dimensional crystal structures observed at low aspect ratios to two-dimensional sheets and tubes at higher aspect ratios. Our work thus illustrates the rich self-assembly behavior accessible when exploiting the interplay between competing long- and short-range anisotropic interactions in colloidal systems.},
  author       = {Azari, Arash and Crassous, Jérôme J. and Mihut, Adriana M. and Bialik, Erik and Schurtenberger, Peter and Stenhammar, Joakim and Linse, Per},
  issn         = {0743-7463},
  language     = {eng},
  month        = {11},
  number       = {48},
  pages        = {13834--13840},
  publisher    = {The American Chemical Society},
  series       = {Langmuir},
  title        = {Directed Self-Assembly of Polarizable Ellipsoids in an External Electric Field},
  url          = {http://dx.doi.org/10.1021/acs.langmuir.7b02040},
  volume       = {33},
  year         = {2017},
}