Colloidal Interactions and Transport in Nematic Liquid Crystals

by: SA Tatarkova, DR Burnham, AK Kirby, GD Love, EM Terentjev

Physical Review Letters, Vol. 98, No. 15. (2007)

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Abstract

We describe a new nematic liquid-crystal colloid system which is characterized by both charge stabilization of the particles and an interaction force. We estimate the effective charge of the particles by electrophoretic measurements and find that in such systems the director anchoring energy W is very low and the particles have little director distortion around them. The interaction force is created by producing a radial distribution of the nematic order parameter around a locally isotropic region created by ir laser heating. We theoretically describe this as being due to the induced flexoelectric polarization, the quadrupolar symmetry of which provides the required long-range force acting on charged particles.

@article{citeulike:1243619, abstract = {We describe a new nematic liquid-crystal colloid system which is characterized by both charge stabilization of the particles and an interaction force. We estimate the effective charge of the particles by electrophoretic measurements and find that in such systems the director anchoring energy W is very low and the particles have little director distortion around them. The interaction force is created by producing a radial distribution of the nematic order parameter around a locally isotropic region created by ir laser heating. We theoretically describe this as being due to the induced flexoelectric polarization, the quadrupolar symmetry of which provides the required long-range force acting on charged particles.}, author = {Tatarkova, S. A. and Burnham, D. R. and Kirby, A. K. and Love, G. D. and Terentjev, E. M. }, citeulike-article-id = {1243619}, doi = {http://dx.doi.org/10.1103/PhysRevLett.98.157801}, journal = {Physical Review Letters}, keywords = {2007, charge, colloids, liquidcrystal}, number = {15}, posted-at = {2008-03-19 01:04:38}, priority = {2}, publisher = {APS}, title = {Colloidal Interactions and Transport in Nematic Liquid Crystals}, url = {http://dx.doi.org/10.1103/PhysRevLett.98.157801}, volume = {98}, year = {2007} }

RIS record

TY - JOUR ID - citeulike:1243619 L3 - citeulike-article-id:1243619 N2 - We describe a new nematic liquid-crystal colloid system which is characterized by both charge stabilization of the particles and an interaction force. We estimate the effective charge of the particles by electrophoretic measurements and find that in such systems the director anchoring energy W is very low and the particles have little director distortion around them. The interaction force is created by producing a radial distribution of the nematic order parameter around a locally isotropic region created by ir laser heating. We theoretically describe this as being due to the induced flexoelectric polarization, the quadrupolar symmetry of which provides the required long-range force acting on charged particles. IS - 15 JF - Physical Review Letters TI - Colloidal Interactions and Transport in Nematic Liquid Crystals PB - APS VL - 98 KW - 2007 KW - charge KW - colloids KW - liquidcrystal AU - Tatarkova, SA AU - Burnham, DR AU - Kirby, AK AU - Love, GD AU - Terentjev, EM PY - 2007/// UR - http://dx.doi.org/10.1103/PhysRevLett.98.157801 ER -

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