Hydrogen sulfide (H2S), a third gas signaling molecule, is considered to play a vital role in the development and treatment of diseases. To elucidate the intricate role of H2S in the organism and its participation in disease processes, there is an urgent need to visualize the dynamics of H2S. However, most currently available molecular probes have limitations in terms of sensitivity, specificity, and precision. In this study, the safe and biocompatible upconversion nanosensor NaYF4:Yb3+, Tm3+@NaYF4 anchored with Ag2O was successfully fabricated for H2S detection with an ultralow detection limi...
