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Title: Determination of liquid crystal polar anchoring energy by electrical measurements
Authors: Murauski, Anatoli
Chigrinov, Vladimir G.
Muravsky, Alexander
Yeung, Fion Sze Yan
Ho, Jacob Y. L.
Kwok, Hoi-Sing
Keywords: Liquid crystals
Polar anchoring
Electrical measurements
Capacitance measurements
Issue Date: Jun-2005
Citation: Physical review. E, v. 71, p. 061707, 2005
Abstract: We propose a simple method for determination of liquid crystal (LC) polar anchoring energy by electrical measurements. The basic idea of this method is a two-channel scheme for capacitance measurements. The first channel uses one cell with planar LC cell, while the second - LC cell with vertical alignment (VA). One of the LC cells can have a high pretilt angle. The proposed method allows investigating anchoring properties of both planar and vertical aligned LC materials. Simultaneous measurements of the two cells compensate all volume effects in LC bulk and provide a good opportunity to study directly the LC-surface interaction. The method can be applied for LC cells, which do not have uniform azimuthal orientation. We used this method to investigate the polar anchoring properties of photoaligning material before and after illumination and for LC structures with a high pretilt angle.
Rights: Physical review E © (2005) American Physical Society. The journal's web site is located at
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