为了消除chiral nematic-chiral smectic C(N*-SmC*)相序铁电液晶从N*相降温到SmC*相时形成的两畴织构缺陷,提高液晶的响应速度,选用铁电液晶R-2301以及两种取向剂SE-410和RN-1199制备了5种铁电液晶样品器件。实验后,对5种器件的排列织构的正交偏光显微镜照片进行对比,得出通过非对称边界锚定作用可以得到均匀单畴排列的铁电液晶器件的结论。实验结果表明:经过非对称边界锚定作用可以得到电光曲线为半"V"字型且静态对比度为300:1的均匀单畴排列铁电液晶器件。这一结论和理论近似计算结果相吻合,为N*-SmC*相序铁电液晶器件实现单畴排列制备提供了新的方法和途径。
In order to eliminate the two-domain texture defects of Ferroelectric Liquid Crystal (FLC)samples(chiral nematic-chiral smectic C(N-SmC)) in their phase sequences to be cooled down from the N phase to the SmC phase,five kinds of FLC devices were prepared by using a FLC R-2301 and two kinds of liquid crystal alignment films SE-410 and RN-1199.After experiments and tests,it is concluded that the uniform mono-domain alignment of ferroelectric liquid crystals can be obtained by asymmetric boundary anchoring.Furthermore,the alignment textures of five devices were tested by a polarizing optical microscope with the crossed polarizers,and experimental results show that the FLC devices can offer half-V-shaped electric-optical characters and a static contrast ratio in 300:1 after asymmetric boundary anchoring.The conclusion is in good agreement with the theoretical approximation and can provide a simple and novel method for fabricating ferroelectric liquid crystal devices.