Polarizing Optical Microscopic Characterization of Nematic Liquid Crystal Confined in Porous Silicon
With polarizing optical microscopy we have investigated the electro-optic properties of a nematic liquid crystal 4-n-pentyl-4′-cyanobipheny confined in the microchannels of porous silicon. Experimental study shows clearly that the liquid crystal molecules tend to align parallel to the direction of the pore columns in porous silicon. Schlieren textures with S = +1 and +2 disclinations were recorded. Our experimental investigations show that uniaxial alignment, the planar radial and the escaped radial configurations exist around the given microchannels of porous silicon.
Yuan Ming Huang
Y. M. Huang et al., "Polarizing Optical Microscopic Characterization of Nematic Liquid Crystal Confined in Porous Silicon", Solid State Phenomena, Vols. 181-182, pp. 83-87, 2012