Single up-conversion nanocrystal as a local temperature probe of electrically heated silver nanowire

Abstract

A single up-conversion nanocrystal can monitor the temperature of an electrically heated silver nanowire.

Continuous spatial field confocal thermometry using lanthanide doped tellurite glass

“…For localised temperature sensing of specific regions in a sample, Er-Yb doped upconversion nanocrystals were widely used 24 – 26 . The nanocrystals were placed in close proximity of or within the sample that was imaged using scanning confocal microscopy, combined with spectral measurement of the green fluorescence of the erbium ions in the nanocrystals.…”

“…The nanocrystals were placed in close proximity of or within the sample that was imaged using scanning confocal microscopy, combined with spectral measurement of the green fluorescence of the erbium ions in the nanocrystals. For example, isolated nanocrystals scattered in close proximity of a single silver nanowire were used to monitor the temperature of the nanowire, whereby the scanning confocal microscope system determined the spatial resolution to be in the order of 100 nm with an uncertainty in temperature measurements of C 24 . Other examples involved the use of nanocrystals that were engulfed by cells via endocytosis to monitor the temperature of cell organelles in the range of 5–60 C with sensitivity of 10 K 25 , 26 .…”