Graphene quantum dot-coated polystyrene microsphere multilayer colloidal crystals with distributed Bragg reflector absorption.

ABSTRACT: Distributed Bragg reflector (DBR) absorptive materials have broad applications in optical fibre communications, solar cells, and other fields. This study adopts dispersion polymerization to prepare monodisperse polystyrene (PS) microspheres. Graphene quantum dots (GQDs) are prepared using the ultrasonic dispersion method. By coating GQDs on surfaces of PS spheres, the micron-sized core-extremely thin shell, PS@GQDs structures are self-assembled successfully. Finally, using the improved gravity sedimentation, the unconventional colloidal crystals of PS@GQDs structures are fabricated and characterized for the first time. The unconventional colloidal crystals of PS@GQDs exhibit tunable DBR scattering absorption, ranging from near-ultraviolet to near-infrared, which is unlike the conventional

SUBMITTER: Chang B 

PROVIDER: S-EPMC11906851 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature