Journal
NANO LETTERS
Volume 14, Issue 7, Pages 3903-3907Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl501155h
Keywords
Liquid crystal; topography; chemistry; anchoring control; phenomenological model; bistability
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Funding
- Netherlands Organization for Scientific Research (NWO)
- EU ITN HIERARCHY
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The alignment of Liquid Crystal (LC) molecules, essential for their applications in optical devices such as displays, is usually controlled by functionalizing their confining surfaces by either patterning or by specific surfactants that induce either parallel or perpendicular molecular arrangement. Inducing a bistable alignment, such as in the new zenithal bistable displays, offers new opportunities in terms of new functionalities and lower energy consumption but a full understanding of such bistable alignment appears still complicated. Here we present a simple phenomenological model that includes surface topography and chemistry. The predicted orientational transitions and bistable states are in excellent agreement with experiments, thus making this a proper tool to design multistable 3D command layers.
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