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Pillar‐Assisted Epitaxial Assembly of Toric Focal Conic Domains of Smectic‐A Liquid Crystals
Author(s) -
Honglawan Apiradee,
Beller Daniel A.,
Cavallaro Marcello,
Kamien Randall D.,
Stebe Kathleen J.,
Yang Shu
Publication year - 2011
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201103008
Subject(s) - pillar , conic section , materials science , epitaxy , hexagonal crystal system , liquid crystal , nanotechnology , crystallography , condensed matter physics , geometry , optoelectronics , layer (electronics) , chemistry , physics , mathematics , structural engineering , engineering
SU‐8 pillar‐assisted epitaxial assembly of toric focal conic domains (TFCDs) arrays of smectic‐A liquid crystals is studied. The 3D nature of the pillar array is crucial to confine and direct the formation of TFCDs on the top of each pillar and between neighboring pillars, leading to highly ordered square and hexagonal array TFCDs. Excellent agreement between the experimentally obtained critical pillar diameter and elasticity calculation is found.