Two-Dimensional Nematic Colloidal Crystals Self-Assembled by Topological Defects

by: Igor Musevic, Miha Skarabot, Uros Tkalec, Miha Ravnik, Slobodan Zumer

Science, Vol. 313, No. 5789. (18 August 2006), pp. 954-958.

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The ability to generate regular spatial arrangements of particles is an important technological and fundamental aspect of colloidal science. We showed that colloidal particles confined to a few-micrometer-thick layer of a nematic liquid crystal form two-dimensional crystal structures that are bound by topological defects. Two basic crystalline structures were observed, depending on the ordering of the liquid crystal around the particle. Colloids inducing quadrupolar order crystallize into weakly bound two-dimensional ordered structure, where the particle interaction is mediated by the sharing of localized topological defects. Colloids inducing dipolar order are strongly bound into antiferroelectric-like two-dimensional crystallites of dipolar colloidal chains. Self-assembly by topological defects could be applied to other systems with similar symmetry. 10.1126/science.1129660

@article{citeulike:2870131, abstract = {The ability to generate regular spatial arrangements of particles is an important technological and fundamental aspect of colloidal science. We showed that colloidal particles confined to a few-micrometer-thick layer of a nematic liquid crystal form two-dimensional crystal structures that are bound by topological defects. Two basic crystalline structures were observed, depending on the ordering of the liquid crystal around the particle. Colloids inducing quadrupolar order crystallize into weakly bound two-dimensional ordered structure, where the particle interaction is mediated by the sharing of localized topological defects. Colloids inducing dipolar order are strongly bound into antiferroelectric-like two-dimensional crystallites of dipolar colloidal chains. Self-assembly by topological defects could be applied to other systems with similar symmetry. 10.1126/science.1129660}, author = {Musevic, Igor and Skarabot, Miha and Tkalec, Uros and Ravnik, Miha and Zumer, Slobodan }, citeulike-article-id = {2870131}, doi = {http://dx.doi.org/10.1126/science.1129660}, journal = {Science}, keywords = {2d, colloids, defect, emory, liquidcrystal, packing, phase, science, scm, structure, technique}, month = {August}, number = {5789}, pages = {954--958}, posted-at = {2008-06-06 18:49:02}, priority = {2}, title = {Two-Dimensional Nematic Colloidal Crystals Self-Assembled by Topological Defects}, url = {http://dx.doi.org/10.1126/science.1129660}, volume = {313}, year = {2006} }

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TY - JOUR ID - citeulike:2870131 L3 - citeulike-article-id:2870131 TI - Two-Dimensional Nematic Colloidal Crystals Self-Assembled by Topological Defects JF - Science VL - 313 IS - 5789 SP - 954 EP - 958 N2 - The ability to generate regular spatial arrangements of particles is an important technological and fundamental aspect of colloidal science. We showed that colloidal particles confined to a few-micrometer-thick layer of a nematic liquid crystal form two-dimensional crystal structures that are bound by topological defects. Two basic crystalline structures were observed, depending on the ordering of the liquid crystal around the particle. Colloids inducing quadrupolar order crystallize into weakly bound two-dimensional ordered structure, where the particle interaction is mediated by the sharing of localized topological defects. Colloids inducing dipolar order are strongly bound into antiferroelectric-like two-dimensional crystallites of dipolar colloidal chains. Self-assembly by topological defects could be applied to other systems with similar symmetry. 10.1126/science.1129660 KW - 2d KW - colloids KW - defect KW - emory KW - liquidcrystal KW - packing KW - phase KW - science KW - scm KW - structure KW - technique AU - Musevic, Igor AU - Skarabot, Miha AU - Tkalec, Uros AU - Ravnik, Miha AU - Zumer, Slobodan PY - 2006/08/18/ UR - http://dx.doi.org/10.1126/science.1129660 ER -

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