Photonic Artifacts in Ratiometric Luminescence Nanothermometry.

ABSTRACT: Ongoing developments in science and technology require temperature measurements at increasingly higher spatial resolutions. Nanocrystals with temperature-sensitive luminescence are a popular thermometer for these applications offering high precision and remote read-out. Here, we demonstrate that ratiometric luminescence thermometry experiments may suffer from systematic errors in nanostructured environments. We place lanthanide-based luminescent nanothermometers at controlled distances of up to 600 nm from a Au surface. Although this geometry supports no absorption or scattering resonances, distortion of the emission spectra of the thermometers due to the modified density of optical states results in temperature read-out errors of up to 250 K. Our simple analytical model explains the effec

SUBMITTER: Vonk SJW 

PROVIDER: S-EPMC10375589 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature