What Techniques are Used for Nanoscale Thermometry?
Several techniques have been developed for nanoscale thermometry, each with its own advantages and limitations:
Optical Methods: These include fluorescence thermometry, where the temperature dependence of fluorescent properties of certain materials is used. Raman spectroscopy is another optical method where shifts in Raman spectra provide temperature information. Scanning Probe Techniques: Methods like Scanning Thermal Microscopy (SThM) use a heated probe to scan surfaces, providing high spatial resolution temperature maps. Nanoparticle-Based Sensors: These utilize the temperature-dependent properties of nanoparticles, such as their magnetic or luminescent characteristics, to measure temperature. Phase Change Materials: Certain materials exhibit changes in their physical state at specific temperatures. These can act as nanoscale temperature indicators.
