Multifunctional azo-BODIPY-functionalised upconversion nanoparticles as sensors of hypoxia in biological environments - Yao, Jingke; Simon-Fuente, Silvia; Lopez-Pena, Gabriel; Gomez-Pastor, Silvia; Guisan-Ceinos, Santiago; Marin, Riccardo; Martin Rodriguez, Emma; Jaque, Daniel; Sanz-Rodriguez, Francisco; Ribagorda, Maria; Ortgies, Dirk H (Journal of Materials Chemistry C, 2025)