Enhance the electrical conductivity and charge storage of nematic phase by doping 0D photoluminescent graphene was prepared with small organic molecule as a new array quantum dot liquid crystal displays

Carbon Quantum Dots doped Cholesteric Liquid Crystal Films and Microdroplets for Anti-Counterfeiting

“…As the concentration of CQDs increases, the isotropic transition temperature drops from 57 °C (pure CLC) to 56.3 °C (sample S: 1 wt % CQDs in CLC). 13,42,43 The CLC to isotropic phase transition is schematically shown in Figure 6b.…”

“…The pitch, p , of cholesteric liquid crystals is proportional to the helical twisting power and the concentration of chiral dopant. The reflection color may be changed by adjusting the pitch length p , which is sensitive to stimuli, including temperature, pressure, and external electric and magnetic fields. , As a result, CLCs have a wide range of applications such as sensors, smart coatings, optical indicators, and anticounterfeiting labels. , Dispersion of fluorescent additives such as graphene quantum dots and pigments, as well as dyes, into LCs is now a typical technique for studying the enhancement of various LC properties. − Under daytime, these fluorescent additives have a specific color, and in UV light, they have a fluorescent emission color. The color exhibited by these additives in daylight may or may not be changed.…”

Enhancement in electrical conductivity of liquid crystals by graphene metal oxide composites

“…Moreover, in the cases of chain and network formation, the enhancement in DC conductivity can disturb the LC properties. Studies have shown this effect for LCs doped by nanoparticles made from carbon nanotubes, metals, and polymeric inclusions 6 , 17 – 19 . Alternatively, better exploitation of liquid crystalline behavior for demanding applications needs an understanding of ionic phenomena in LCs doped with nanomaterials 20 , 21 and identification of processes that lead to the purification of LCs with optimal values of nanomaterials 14 , 15 , 22 , 23 .…”

“…Doped LCs exhibit significantly improved properties compared to their undoped ones, while they also achieve long-term stability for industrial applications 2 – 5 . It has been shown that low loadings of various nanomaterials with zero-, one-, and two-dimensional structures dispersed in LCs media can significantly affect their physical properties, especially space-charge distribution 6 – 11 . For instance, electro-optical response as well as the electrical behavior of LCs can be influenced by such doping 12 , 13 .…”