NaYF4: 5% Tm3+,50% Er3+@NaYF4 Upconversion nanoparticles,EX:1208nm

NaYF4: 5% Tm3+,50% Er3+@NaYF4 Upconversion nanoparticles is a new type of Tm3+ sensitized lanthanide nanocrystals in the NIR-II window for in vivo optical information storage and decoding.Taking advantage of the tunable fluorescence lifetimes, the optical multiplexed encoding capacity is enhanced accordingly.Micro-devices with QR codes featuring the NIR-II fluorescence-lifetime multiplexed encoding were implanted into mice and were successfully decoded through time-gated fluorescence imaging technology.

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