Blue/red ratiometric pH sensors without background signals based on 808 nm-excited core--triple shell up-conversion nanoparticles.

Authors: Tao Wang, Fenglei Sun, Zike Jiang, Jing Wang, Yanyan Ma, Haitao Lin, Hongmin Lv, Shanshan Xu, Jinhua Li Guangjun Zhou

Source: Journal of Materials Chemistry C; 12/28/2021, Vol. 9 Issue 48, p17451-17460, 10p