Liquid Crystals Beyond Displays: Chemistry, Physics, and Applications

Figure 1.21 Helical structure in a CLC microdroplet. Image of microdroplet in a lasing condition is also shown [76].

Figure 2.20 Top: Synchrotron XRD patterns from homeotropic monodomain of material 35 (a) and the blend of 35 (b) with PC₆₁BM in an 8-µm-thick glass cell. Bottom: Calculated geometric dimensions of porphyrin 35 and 3D ChemDraw spacing-filling model of fullerene derivative PC₆₁BM and the schematic representations of homeotropically aligned architecture of the blend of 35 and PC₆₁BM. Reproduced with permission from ref. 110.

Figure 2.32 Formation of homeotropic texture on a macroscopic scale via slow cooling of the 1.8 µm cell with 33. Slow cooling induces selective nucleation and growth of homeotropic domain (parts (a) and (b) at 121.0°C) and hence yields uniform homeotropic columnar orientation at lower temperatures ((c) 113.0°C and (d) 75.0°C), confirmed by both (e) optical texture under crossed polarizers and (f) conoscopic image at 75.0°C. Optical images were taken at (a–d) 70° and (e) 90° angles between polarizers. The scale bar corresponds to 50 µm. (g) X-ray 2D pattern for the Col_h phase at 75.0°C of 33. (h) The azimuthal scan of the peak in (g) shows equally spaced six peaks with uniform intensity distribution. Reproduced with permission from ref. 77(a). ...