Broadband NIR photostimulated luminescence nanoprobes based on CaS:Eu²⁺,Sm³⁺ nanocrystals.

ABSTRACT: Near-infrared (NIR) photostimulated luminescence (PSL) nanocrystals (NCs) have recently evoked considerable interest in the field of biomedicine, but are currently limited by the controlled synthesis of efficient PSL NCs. Herein, we report for the first time the controlled synthesis of CaS:Eu²⁺,Sm³⁺ NIR PSL NCs through a high-temperature co-precipitation method. The role of Sm³⁺ co-doping and the effect of thermal annealing on the optical properties of the NCs as well as the charging and discharging processes, the trap depth distribution, and the underlying PSL mechanism are comprehensively surveyed by means of photoluminescence, persistent luminescence, thermoluminescence, and PSL spectroscopies. The as-prepared NCs exhibit intense PSL of Eu²⁺ a

SUBMITTER: Gao Y 

PROVIDER: S-EPMC6552487 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature