Fig. 1 | Nature Communications

Fig. 1

From: Ratiometric nanothermometer in vivo based on triplet sensitized upconversion

Fig. 1

Schematic illustration of the TTA-Nd-NPs based ratiometric thermometry in vivo. a TTA-upconversion is sensitively responsive to temperature changes. With the assistance of an internal reference, the calibrated TTA-UCL signals become capable for accurate temperature monitoring in a small animal. b Chemical structures of the TTA chromophores containing BDM (TTA annihilator) and PtTPBP (TTA sensitizer), and schematic structure of the Nd3+ nanophosphor (reference). BSA: bovine serum albumin, ISC: intersystem crossing, TTET: triplet–triplet energy transfer, TTA: triplet–triplet annihilation

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