One ion to catch them all: Targeted high-precision Boltzmann thermometry over a wide temperature range with Gd³.

ABSTRACT: Ratiometric luminescence thermometry with trivalent lanthanide ions and their 4fⁿ energy levels is an emerging technique for non-invasive remote temperature sensing with high spatial and temporal resolution. Conventional ratiometric luminescence thermometry often relies on thermal coupling between two closely lying energy levels governed by Boltzmann's law. Despite its simplicity, Boltzmann thermometry with two excited levels allows precise temperature sensing, but only within a limited temperature range. While low temperatures slow down the nonradiative transitions required to generate a measurable population in the higher excitation level, temperatures that are too high favour equalized populations of the two excited levels, at the expense of low relative thermal sensitivity.

SUBMITTER: Yu D 

PROVIDER: S-EPMC8608900 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature