Colloidal Aggregation in a Nematic Liquid Crystal: Topological Arrest of Particles by a Single-Stroke Disclination Line

by: Takeaki Araki, Hajime Tanaka

Physical Review Letters, Vol. 97, No. 12. (2006)

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Abstract

We numerically study many-body interactions among colloidal particles suspended in a nematic liquid crystal, using a fluid particle dynamics method, which properly incorporates dynamical coupling among particles, nematic orientation, and flow field. Based on simulation results, we propose a new type of interparticle interaction in addition to well-known quadrupolar interaction for particles accompanying Saturn-ring defects. This interaction is mediated by the defect of the nematic phase: upon nematic ordering, a closed disclination loop binds more than two particles to form a sheetlike dynamically arrested structure. The interaction depends upon the topology of a disclination loop binding particles, which is determined by aggregation history.

@article{citeulike:2791741, abstract = {We numerically study many-body interactions among colloidal particles suspended in a nematic liquid crystal, using a fluid particle dynamics method, which properly incorporates dynamical coupling among particles, nematic orientation, and flow field. Based on simulation results, we propose a new type of interparticle interaction in addition to well-known quadrupolar interaction for particles accompanying Saturn-ring defects. This interaction is mediated by the defect of the nematic phase: upon nematic ordering, a closed disclination loop binds more than two particles to form a sheetlike dynamically arrested structure. The interaction depends upon the topology of a disclination loop binding particles, which is determined by aggregation history.}, author = {Araki, Takeaki and Tanaka, Hajime }, citeulike-article-id = {2791741}, doi = {10.1103/PhysRevLett.97.127801}, journal = {Physical Review Letters}, keywords = {2006, colloids, defect, interaction, liquidcrystal, simulation, tanaka}, number = {12}, posted-at = {2008-05-13 01:25:51}, priority = {2}, publisher = {APS}, title = {Colloidal Aggregation in a Nematic Liquid Crystal: Topological Arrest of Particles by a Single-Stroke Disclination Line}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PRLTAO000097000012127801000001\&idtype=cvips\&gifs=yes}, volume = {97}, year = {2006} }

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TY - JOUR ID - citeulike:2791741 L3 - citeulike-article-id:2791741 TI - Colloidal Aggregation in a Nematic Liquid Crystal: Topological Arrest of Particles by a Single-Stroke Disclination Line JF - Physical Review Letters VL - 97 IS - 12 PB - APS N2 - We numerically study many-body interactions among colloidal particles suspended in a nematic liquid crystal, using a fluid particle dynamics method, which properly incorporates dynamical coupling among particles, nematic orientation, and flow field. Based on simulation results, we propose a new type of interparticle interaction in addition to well-known quadrupolar interaction for particles accompanying Saturn-ring defects. This interaction is mediated by the defect of the nematic phase: upon nematic ordering, a closed disclination loop binds more than two particles to form a sheetlike dynamically arrested structure. The interaction depends upon the topology of a disclination loop binding particles, which is determined by aggregation history. KW - 2006 KW - colloids KW - defect KW - interaction KW - liquidcrystal KW - simulation KW - tanaka AU - Araki, Takeaki AU - Tanaka, Hajime PY - 2006/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000097000012127801000001&idtype=cvips&gifs=yes ER -

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