Tuning Quantum‐Dot Organization in Liquid Crystals for Robust Photonic Applications

摘要: Mesogenic ligands have the potential to provide control over dispersion and stabilization of nanoparticles in liquid crystal (LC) phases. The creation such hybrid materials is an important goal for soft tunable photonic devices, as LC laser. Herein, we present a comparison isotropic mesogenic attached surface CdSe (core-only) CdSe/ZnS (core/shell) quantum dots (QDs). ligand's flexible arm structure enhances ligand alignment, with local director promoting QD nematic To characterize on different length scales, apply fluorescence microscopy, X-ray scattering, scanning confocal photoluminescent imaging. These combined techniques demonstrate that LC-modified QDs do not aggregate into dense clusters observed simple when dispersed crystal, but loosely associate fluid-like droplet average interparticle spacing >10 nm. Embedding cholesteric cavity, observe comparable coupling effects those reported more closely packed ligands.