Enhancement of single upconversion nanoparticle imaging by topologically segregated core-shell structure with inward energy migration.

ABSTRACT: Manipulating topological arrangement is a powerful tool for tuning energy migration in natural photosynthetic proteins and artificial polymers. Here, we report an inorganic optical nanosystem composed of NaErF₄ and NaYbF₄, in which topological arrangement enhanced upconversion luminescence. Three architectures are designed for considerations pertaining to energy migration and energy transfer within nanoparticles: outside-in, inside-out, and local energy transfer. The outside-in architecture produces the maximum upconversion luminescence, around 6-times brighter than that of the inside-out at the single-particle level. Monte Carlo simulation suggests a topology-dependent energy migration favoring the upconversion luminescence of outside-in structure. The optimized outs

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC9546905 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature