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Penn researchers show new level of control over liquid crystals
Date:1/7/2013

stal layers and they would be expelled into to the defects," Yang said.

A template consisting of circular posts could even be dynamically altered with heat and an electric field, for example, making the posts in a certain region elliptical. This microscopic geometric cue would travel up the layers of liquid crystal and produce micrometer-scale changes on the surface.

By establishing the mathematical relationships between the post parameters and the surface-layer defects, the researchers are laying the foundation of a directed assembly technique that can be used with any smectic liquid crystal.

"We are providing a very crude cue and getting exquisite molecular level organization," Stebe said. "Any liquid crystal that makes layers can now be used to make rather beautiful control over textures on the surface.


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Contact: Evan Lerner
elerner@upenn.edu
215-573-6604
University of Pennsylvania
Source:Eurekalert  

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