Chaining of hard disks in nematic needles: particle-based simulation of colloidal interactions in liquid crystals
Chaining of hard disks in nematic needles: particle-based simulation of colloidal interactions in liquid crystals
复制标题
向列针中的硬盘链接:基于粒子的液晶胶体相互作用模拟
DOI:
10.1038/s41598-020-69544-4
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发表时间:
2020
影响因子:
4.6
通讯作者:
Jan Kierfeld
中科院分区:
文献类型:
--
作者:
David Müller;Tobias Alexander Kampmann;Jan Kierfeld
Colloidal particles suspended in liquid crystals can exhibit various effective anisotropic interactions that can be tuned and utilized in self-assembly processes. We simulate a two-dimensional system of hard disks suspended in a solution of dense hard needles as a model system for colloids suspended in a nematic lyotropic liquid crystal. The novel event-chain Monte Carlo technique enables us to directly measure colloidal interactions in a microscopic simulation with explicit liquid crystal particles in the dense nematic phase. We find a directional short-range attraction for disks along the director, which triggers chaining parallel to the director and seemingly contradicts the standard liquid crystal field theory result of a quadrupolar attraction with a preferredangle. Our results can be explained by a short-range density-dependent depletion interaction, which has been neglected so far. Directionality and strength of the depletion interaction are caused by the weak planar anchoring of hard rods. The depletion attraction robustly dominates over the quadrupolar elastic attraction if disks come close. Self-assembly of many disks proceeds via intermediate chaining, which demonstrates that in lyotropic liquid crystal colloids depletion interactions play an important role in structure formation processes.
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DOI:
--
发表时间:
2014
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
R. Vink
通讯作者:
R. Vink
影响因子:
3.4
作者:
S. Püschel-Schlotthauer;T. Stieger;M. Melle;M. G. Mazza;M. Schoen
通讯作者:
M. Schoen
DOI:
10.1103/physreve.83.041709
发表时间:
2011
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
U. Ognysta;A. Nych;V. Uzunova;V. M. Pergamenschik;V. Nazarenko;M. Škarabot;I. Muševič
通讯作者:
I. Muševič
影响因子:
2.9
作者:
FRENKEL, D;EPPENGA, R
通讯作者:
EPPENGA, R
DOI:
10.1080/10587259608034594
发表时间:
1996-01-01
影响因子:
--
作者:
Ramaswamy, S;Nityananda, R;Prost, J
通讯作者:
Prost, J