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- W1978826654 abstract "We have observed that a single groove made by an atomic force microscope (AFM) tip in a polyimide layer strongly aligns nematic liquid crystals locally and have used this phenomenon for studying twist nematic lines. We have measured the intensity profile of light transmitted across a single line and the azimuthal surface energy as a function of the spatial separation of grooves. From these measurements, we have determined the azimuthal surface anchoring energy of the AFM structured and of the untreated polyimide. We find that the twist coherence length, which determines the width of TN lines, is approximately proportional to the cell thickness, while the surface anchoring energy can change it for a factor of 2 at maximum." @default.
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- W1978826654 date "2003-11-15" @default.
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- W1978826654 title "Observation of twist nematic liquid-crystal lines" @default.
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- W1978826654 doi "https://doi.org/10.1063/1.1623925" @default.
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