Nanoscale temperature measurement with high
sensitivity is important to investigating many phenomena such as
heat dissipation of nano-/micro-electronics, chemical reactions in
nanoliter volume, thermoplasmonics of nanoparticles, and thermal
processes in live systems. There have been various nanoscale
thermometry schemes, including the SQUID-based nanothermometry,
scanning thermal microscopy, and fluorescence thermometry based on
rare-earth nanoparticles, dyes, or proteins. However, these
techniques are limited by various factors, such as contact-related
artifacts, fluorescence instability, low sensitivity, or the
requirement of extreme working conditions.
