Single Er<sup>3+</sup>/Yb<sup>3+</sup>-Codoped Yttria Nanocrystals for Temperature Sensing: Experimental Characterization and Theoretical Modeling
Rodrigo Galvão, Luiz Fernando dos Santos, Karmel de Oliveira Lima, Rogéria Rocha Gonçalves, Leonardo de S. Menezes
Abstract
In this work, Er3+/Yb3+-codoped yttria (Y2O3) nanocrystals were characterized for the first time as a thermometric probe at the single nanocrystal level using the luminescence intensity ratio technique. Nanothermometer characterization was performed by exciting the single nanoparticles with a low-power, continuous-wave laser emitting at 980 nm, within one of the biological windows. The nanothermometer showed a relative sensitivity of 1.31% and an accuracy of 0.1 K at 300 K. The results were described by a rate equation analysis using a dual effective phonon model, which reproduced the expected phonon energy of the host matrix.
Topics & Concepts
NanocrystalMaterials scienceYttria-stabilized zirconiaLuminescencePhononCharacterization (materials science)NanoparticleAnalytical Chemistry (journal)Continuous waveLaserNanotechnologyOptoelectronicsCondensed matter physicsOpticsChemistryPhysicsCubic zirconiaComposite materialCeramicChromatographyLuminescence Properties of Advanced MaterialsOptical properties and cooling technologies in crystalline materialsSpectroscopy and Laser Applications