1. Ratiometric intracellular pH sensors based on nitrogen-doped graphene oxide quantum dots. Issue 5 (May 2022) Authors: Zhang, Xiang; Gu, Yu; Zhang, Yun; Yu, Guo-Yin; Liao, Zhi-Peng; Wu, Hui-Fang; Shi, Chuan-Guo Journal: Heliyon Issue: Volume 8:Issue 5(2022) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗