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Liquid Crystals: Controlled Planar Alignment of Discotic Liquid Crystals in Microchannels Made Using SU8 Photoresist (Adv. Funct. Mater. 48/2013)
Author(s) -
Cattle James,
Bao Peng,
Bramble Jonathan P.,
Bushby Richard J.,
Evans Stephen D.,
Lydon John E.,
Tate Daniel J.
Publication year - 2013
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201370256
Subject(s) - materials science , photoresist , polarizer , planar , liquid crystal , micrometer , optics , nanotechnology , optoelectronics , layer (electronics) , physics , birefringence , computer graphics (images) , computer science
An optical micrograph taken by R. J. Bushby and co‐workers using crossed polarizers shows a thin film of 1,4,8,11,15,18,22,25‐octaoctylphthalocyanine in its columnar rectangular liquid crystal phase at 100 °C. In such thin, open‐to‐the‐air films, the columns are aligned in‐plane but follow random sweeping lines. However, when open‐to‐the‐air films are confined within micrometer‐scale channels formed from SU8, all of the columns are aligned and point in the same direction, as shown on page 5997 .