In:
Journal of Physics D: Applied Physics, IOP Publishing, Vol. 45, No. 37 ( 2012-09-19), p. 375101-
Abstract:
We demonstrate topologically patterned dual-groove surfaces for liquid crystal (LC) surface anchoring, where the dual-groove structure is made by a replica-moulding method from a self-structured poly(dimethylsiloxane) (PDMS) surface. In our method, the micro-groove structure with a periodicity on the order of micrometres is self-structured on the oxidized PDMS mould surface having a photolithographically defined macro-groove pattern owing to a thermally induced anisotropic stress effect. The direction of the micro-groove is determined to be perpendicular to the macro-groove direction and to form a mutually orthogonal dual-groove structure. With the presented method, the relative azimuth anchoring strength ratio ( g ) between the macro-groove and the micro-groove can be controlled precisely and easily. We investigated the LC anchoring effect created by the self-structured dual-groove pattern based on g , where the monostable LC anchoring surface is provided by the dual-groove surface with a g value close to 0 or infinity, and bistable LC anchoring is promoted as g approaches 1.
Type of Medium:
Online Resource
ISSN:
0022-3727
,
1361-6463
DOI:
10.1088/0022-3727/45/37/375101
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2012
detail.hit.zdb_id:
209221-9
detail.hit.zdb_id:
1472948-9
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