Fig. 4
From: Carbon Dots as New Generation Materials for Nanothermometer: Review
Time-resolved temperature-dependent PL emission of CDs. Normalized color plots showing time-resolved PL emission maps for CDs at a 2 °C, b 50 °C, and c 80 °C. d The normalized color plot of time-resolved PL intensity at the PL emission maximum (λem = 421 nm) at temperatures between 2 and 80 °C. e Extracted PL lifetimes plotted as a function of temperature in the range of 2–80 °C. (Reproduced from reference [89])