Phase transitions in smectogenic liquid crystal 4-butoxybenzylidene-4′-butylaniline (BBBA) doped by multiwalled carbon nanotubes

Carbon Nanotubes in Liquid Crystals: Fundamental Properties and Applications

“…This could suggest that CNTs promoted translational disordering in the smectic-A phase. This is in good agreement with MWCNT-induced lowering of the nematic-smectic-A transition temperature [235]. The selective reflection spectra were just slightly smeared (which is typical for introduction of non-mesogenic dopants), and practically no effects on helical twisting (selective reflection maximums) were observed.…”

“…The percolation behaviour was strongly dependent on the temperature, and a noticeable step-like drop of σ in the vicinity of isotropic-nematic transition was observed after the multiple heating-cooling cycles. Figure 10.24 presents optical transmission T r versus temperature T for BBBA doped with CNTs in the vicinity of the nematic-isotropic transition (a) and smectic transitions (b) [235]. The increase in CNT concentration C leads to non-monotonous changes in nematic-isotropic transition temperatures T ni (Fig.…”

Temperature-dependent electro-optical and elastic properties of carbon nanotube doped polar smectogen octylcyanobiphenyl

“…Among these structures, carbon nanotubes (CNTs) are especially worthy of interest from both scientific and technological perspectives [1][2][3][4]. Liquid crystals (LCs) are anisotropic, organic fluids thermodynamically located between the crystalline solid and isotropic liquid and they are known to have characteristic properties such as rigidness along the long axes, being strong dipoles and having easily polarizable substituents [5].…”

Oriented association of multiwall carbon nanotubes upon efficient epitaxial organization of polyfluorene

“…According to the reported studies, the LC hosts is realized able to incorporate carbon nanotubes and align these nanotubes [31][32][33], which nevertheless critically depends on the properties of the host liquid, temperature, and also the volume fraction of carbon nanotubes. Furthermore, the dispersion of carbon nanotubes can be an influential factor on the phase transition behavior of liquid crystalline phase [34]. Employing this preordered state of smectic organization, the impact of the dispersion of carbon nanotubes in binary melt was further explored in this research.…”