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.
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Source: Phys.org