Confined Self-Assembly of Toric Focal Conic Domains (The Effects of Confined Geometry on the Feature Size of Toric Focal Conic Domains)

A smectic liquid crystal (LC) containing a rigid biphenyl group and semifluorinated chains exhibits a high density of toric focal conic domains (TFCDs) arranged in an ordered array when confined within a microchannel. The formation of the TFCDs is strongly influenced by the width (M and depth (h) of the confined microchannels, most importantly, by the channel depth. We studied a broad variety of microchannels, with varying width in the range of 3-200 mu m and depth in the range of 2-10 mu m. The radius of the TFCDs increases with increases in the width until the saturated radius is achieved, which is determined by the depth of the channel. We used the elastic-anchoring model of TFCD formation to explain the experimental observations. The model allows one to trace the dependence of the TFCD radius on the channel depth h, to explain why the TFCDs do not form in channels that are too shallow or too narrow.
Publisher
AMER CHEMICAL SOC
Issue Date
2009-02
Language
ENG
Keywords

A LIQUID-CRYSTALS; SUPRAMOLECULAR COLUMNS; BLOCK-COPOLYMERS; DENDRIMERS; PHASE; MONOLAYERS; PATTERN; DESIGN; GROWTH; ARRAYS

Citation

LANGMUIR, v.25, no.3, pp.1685 - 1691

ISSN
0743-7463
URI
http://hdl.handle.net/10203/9424
Appears in Collection
NT-Journal Papers(저널논문)BiS-Journal Papers(저널논문)PH-Journal Papers(저널논문)CBE-Journal Papers(저널논문)
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