Multifunctional Tm³⁺/Yb³⁺:Na₅Y (MoO₄)₄ nanocrystals for simultaneous luminescent nanothermometry, photothermal therapy and deep bioimaging in the NIR-I window.

ABSTRACT: In this study, Tm³⁺/Yb³⁺ co-doped Na₅Y(MoO₄)₄ (NYMO) nanoparticles were successfully synthesized via the sol-gel method, and their structural, morphological, upconversion (UC) luminescence, and photothermal properties were comprehensively investigated. Upon 975 nm near-infrared (NIR) laser excitation, the NYMO nanoparticles exhibited two prominent UC emission bands at 477 nm and 796 nm, corresponding to the ¹G₄ → ³F₆ and ³H₄ → ³H₆ transitions of Tm³⁺ ions, respectively. The fluorescence intensity ratio (FIR) between these emissions enabled precise optical temperature sensing; at 298 K, the highest relative sensitivity is 2.05% K

SUBMITTER: Bahrouni Y 

PROVIDER: S-EPMC12818937 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature