Heat-driven and electric-field-driven bistable devices using dye-doped nematic liquid crystals
Heat-driven and electric-field-driven bistable devices using dye-doped nematic liquid crystals
复制标题
DOI：
10.1063/1.3446826
复制
发表时间：
2010-06
影响因子：
3.2
通讯作者：
Jin Ki Kim;K. Le;S. Dhara;F. Araoka;K. Ishikawa;H. Takezoe
中科院分区：
文献类型：
--
作者：
Jin Ki Kim;K. Le;S. Dhara;F. Araoka;K. Ishikawa;H. Takezoe
我们已经展示了基于全氟聚合物表面上的液晶的锚定转变的存储器和液晶显示器设备。在冷却和加热过程中会发生平面和垂面之间的自发取向变化，并具有较大的温度滞后。光（热）寻址是可能的，从垂面到平面使用染料掺杂的样品。对于香豆素染料，即使在将样品加热至各向同性温度后，光寻址图像也被保留，而对于4-二氰基亚甲基-2-甲基-6-（对二甲基氨基苯乙烯基）-4H-吡喃染料，图像可以通过降低温度而被擦除。方向切换也通过施加电场而发生，响应时间为几毫秒，取决于场强。
We have demonstrated memory and rewritable bistable devices based on an anchoring transition of a nematic liquid crystal on a perfluoropolymer surface. Spontaneous orientation changes between planar and homeotropic occur on cooling and heating with a large temperature hysteresis. Photo (heat) addressing is possible from homeotropic to planar using dye-doped samples. For a coumarin dye, photoaddressed images are preserved even after heating up the sample to the isotropic temperature, whereas, for a 4-dicyanomethylene-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran dye the images can be erased by decreasing the temperature out of the thermal hysteresis. Orientation switching also occurs by applying an electric field with a response time of several milliseconds depending on the field strength.