Optically reconfigurable color change in chiral nematic liquid crystals based on indolylfulgide chiral dopants

Rotatable Diffraction Gratings Based on Cholesteric Liquid Crystals with Phototunable Helix Pitch

“…In vicinity of the later one the cholesteric layers tend to reorient vertically; however, layers rotation is hindered by planar surface anchoring at the opposite substrate. [ 14,[35][36][37][38][39][40] In the present work we demonstrate a novel type of rotatable diffraction gratings by photocontrolling the helical pitch in a wide range with the possibility of reversible switching of the handedness of the supramolecular helix. This approach has been realized only in a few studies.…”

Optically activated shutter using a photo-tunable short-pitch chiral nematic liquid crystal

“…(1). Thus far, a number of different photo-sensitive units have been studied including azobenzenes, [12][13][14][15][16][17][18] fulgides, 19,20 and chiral olefins. 21,22 When exposed to light, these units undergo a configurational change, such as a photo-isomerization or ring opening.…”

Evaporation Assisted CdSe Nanorod Assembly by Small Angle X-ray Scattering and Langmuir Adsorption

“…nominal Van der Waals influence between rods). By matching the diameter of the sphere representing Vupr , to equal 50 nm and 2 nm, we calculate (using ƍ methylcyclohexane = .77 g/cm 3 ; ƍ CdSe = 5.81 g/cm 3 Table 1 suggesting that evaporation enables solutions to concentrate enough for dipole-dipole interactions to be significant. Alternatively, to approach separations where the Van der Waals influence is relevant, all solutions must evolve toward ~99 wt.% which may be unobservable due to evaporation rates and precipitation in the final drying stage.…”

“…[1][2][3][4][5][6][7] By controlling dielectric contrast or the spatial variation of refraction index, the optical or photonic behavior can be tuned. Tunable photonic crystals use temperature to change the liquid crystal phase and refraction index.…”

“…Res. Technol [Online] 2014,3,[1977][1978][1979][1980][1981][1982][1983][1984]. http://www.ijert.org/view.php?id=8298&title=evaporation-assisted-cdse-nanorod-alignment-in-micro-channels 36.…”