Multiple Ratiometric Nanothermometry using Semiconductor BiFeO3
Nanowires and Quantitative Validation of Thermal Sensitivity
Abstract
Here, we report a very sensitive, non-contact, ratio-metric, and robust
temperature sensing using a combination of conventional and negative
thermal quenching (NTQ) mechanisms of semiconductor BiFeO3 (BFO)
nanowires. Using this approach, we have demonstrated the absolute
thermal sensitivity of ~10x10^-3 K^-1 over the 300
K - 438 K temperature range and the relative sensitivity of 0.75%
K^-1 at 300 K. Further, we have validated thermal sensitivity of BFO
nanowires quantitatively using linear regression and analytical
hierarchy process (AHP) and found close match with the experimental
results. These results indicated that BFO nanowires are excellent
candidates for developing highâperformance luminescence based
temperature sensors.