| 초록 |
Complete solid-state cholesteric liquid crystal (CLCsolid) droplets and shells were fabricated using microfluidics after UV curing and chiral-dopant extraction of monodispersed CLC droplets, which consist of a reactive nematic LC mesogen mixture and a nonreactive chiral dopant. The CLCsolid droplet and shell exhibits a coloured reflection spot at the centre, with cross-communication dots and central concentric rings. The pitch of the well-defined helical photonic structure depends on the solvent quality, temperature, and humidity, giving rise to a reversible change of the reflection colour of the CLCsolid droplet and shell under external stimuli. The CLCsolid droplets and shells are extremely stable for a long time, even in a good solvent. This smart solid-state molecular-spring photonic droplet eliminates the obstacles to CLC-droplet application caused by the fluidic LC state, and thus introduces a new avenue for CLC applications. |
