Electric-Field-Controlled Alignment of Rod-Shaped Fluorescent Nanocrystals in Smectic Liquid Crystal Defect Arrays

摘要: Periodic micro-arrays of straight linear defects containing nanoparticles can be created over large surface areas at the transition from nematic to smectic-A phase in a nanoparticle–liquid crystal (LC) composite material confined under effect conflicting anchoring conditions (unidirectional planar vs normal) and electric fields. Anisomeric dichroic dye molecules rod-shaped fluorescent semiconductor nanocrystals (dot-in-rods) with permanent dipole high linearly polarized photoluminescence quantum yield align parallel local LC molecular director follow its reorientation application field. In nano-sized core regions defects, where is undefined, anisotropic particles defect whereas spherical dots do not show any particular interaction defect. Under an field, ferroelectric region along perpendicular direction, dyes remain This study provides useful insights into complex soft materials such as LCs presence external fields, which may help development field-responsive nanoparticle-based functional materials. Continue reading full article