Precisely tailored shell thickness and Ln³⁺ content to produce multicolor emission from Nd³⁺-sensitized Gd³⁺-based core/shell/shell UCNPs through bi-directional energy transfer.

ABSTRACT: Lanthanide (Ln³⁺)-doped upconversion nanoparticles (UCNPs) have been paid great attention as multiplexing agents due to their numerous uses in biological and clinical applications such as bioimaging and magnetic resonance imaging (MRI), to name a few. To achieve efficient multicolor emission from UCNPs under single 808 nm excitation and avoid detrimental cross-relaxations between the Ln³⁺ activator ions (positioned in either the core and/or shell in the core/shell), it is essential to design an adequate nanoparticle architecture. Herein, we demonstrate the tailoring of multicolor upconversion luminescence (UCL) from Nd³⁺-sensitized Gd³⁺-based core/shell/shell UCNPs with an architecture represented as NaGdF₄:Tm³⁺(0.75)/Yb

SUBMITTER: Serge Correales YE 

PROVIDER: S-EPMC9418845 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature