Blue Phase Temperature Range at n-Cyanobiphenyl Homologue Chiral Nematic Liquid-Crystal Mixtures

Simple and Efficient Chiral Dopants to Induce Blue Phases and Their Optical Purity Effects on the Physical Properties of Blue Phases

“…Some papers have reported that the ratio of the elastic constants K 33 / K 11 was important to stabilize BPs ( K 11 : splay elastic constant; K 33 : bend elastic constant). It is thought that a decrease in K 33 / K 11 lowers the energy of the disclinations in the BPs. , However, another paper has reported that chiral LC compounds with a larger K 33 / K 11 ratio gave a wider BP temperature range . Thus, the relation between K 33 / K 11 and BP stability has not been clarified yet.…”

“…74,75 However, another paper has reported that chiral LC compounds with a larger K 33 / K 11 ratio gave a wider BP temperature range. 76 Thus, the relation between K 33 /K 11 and BP stability has not been clarified yet. In our case, the clear correlation between the K 33 /K 11 ratio and the stability of the BP was not observed.…”

Electro-optical properties of photochemically stable polymer-stabilized blue-phase material

“…16 The great majority of reported and measured blue phase systems are stabilized by a polymer network with a LC host having cyano compound to increase dielectric anisotropy. Usually, 4-cyano-4 0 -pentylbiphenyl (5CB), 17,18 19,20 and cyanoesters 21 are mentioned. In our recent work, 22,23 we demonstrated that the presence of 5CB has entailed reduction of BP temperature range and clearing point.…”