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Planar nematic anchoring due to a periodic surface potential

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2 Author(s)
Bing Wen ; Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106-7079 ; Rosenblatt, Charles

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A polyimide-coated substrate is rubbed periodically with the stylus of an atomic-force microscope. The effective polar and azimuthal anchoring strength coefficients for planar anchoring are determined as a function of the spatial separation L of rub lines. Both anchoring coefficients are found to decrease monotonically with L, apparently leveling off at nonzero values for L≳2 μm. The observed behavior is discussed in terms of a combination of intrinsic anchoring strength in the rubbed regions and a surface memory effect. © 2001 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:89 ,  Issue: 9 )