The use of bowed reverse twist disclination lines for the measurement of long pitch lengths in chiral nematic liquid crystals? |
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| Authors: | E P Raynes |
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| Institution: | Department of Engineering Science , University of Oxford , Parks Road, Oxford OX1 3PJ, UK E-mail: peter.raynes@eng.ox.ac.uk |
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| Abstract: | A novel method is described for the measurement of long pitch lengths in chiral nematic liquid crystals using the bowing of reverse twist disclination lines in 90° twisted nematic devices. The method has been used to measure pitch lengths of up to 50 mm, significantly longer than previously possible using existing methods. |
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| Keywords: | liquid crystal Arrhenius theory surface kinetics calorimeter magnetic effect on phase transitions |
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