Carbon dot-mediated synthesis of NaYF₄:Yb³⁺,Er³⁺@carbon dot composites with enhanced upconversion luminescence for temperature sensing.

ABSTRACT: Upconversion (UC) nanocrystals and carbon dots (CDs) have emerged as significant subjects of research interest across various fields, including biomedicine, fluorescence sensing, and anti-counterfeiting. This study presents a novel method for preparing NaYF₄:Yb³⁺,Er³⁺@CDs composites through the cubic-to-hexagonal phase transformation of NaYF₄ mediated by CDs. The formation of these composites was successfully confirmed through morphological and structural analyses. Notably, the composites were found to enhance UC emission and prolong luminescence lifetime, with these effects being dependent on the quantity of CDs used. The experimental results indicate that the enhanced UC emission in the composites is primarily due to the interception of quenchi

SUBMITTER: Zou L 

PROVIDER: S-EPMC12013606 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature