Small surface pretilt strikingly affects the director profile during Poiseuille flow of a nematic liquid crystal.
Holmes, Christopher J.; Cornford, Stephen Leslie; Sambles, J. Roy
Date: 2010
Journal
Physical Review Letters
Publisher
American Physical Society
Publisher DOI
Related links
Abstract
Conventional nematic liquid crystal cells are fabricated with small surface pretilt of the director induced by rubbed polymer alignment. Depending on the orientation of the bounding surfaces, this may lead to two slightly different untwisted director configurations, splay and parallel. This small difference leads to remarkably different ...
Conventional nematic liquid crystal cells are fabricated with small surface pretilt of the director induced by rubbed polymer alignment. Depending on the orientation of the bounding surfaces, this may lead to two slightly different untwisted director configurations, splay and parallel. This small difference leads to remarkably different director profiles during pressure-driven flow, observed here using optical conoscopy. Data show excellent agreement with numerical modeling from Leslie-Ericksen-Parodi theory.
Physics and Astronomy
Faculty of Environment, Science and Economy
Item views 0
Full item downloads 0