Sensing with (One or Many) Upconverting Nanoparticles - Maturi, Fernando E; Maturi, Fernando E; Ximendes, Erving; Benayas, Antonio; Ortgies, Dirk H; Ortgies, Dirk H; Rodriguez, Emma Martin; Haro-Gonzalez, Patricia; Jaque, Daniel (ACCOUNTS OF CHEMICAL RESEARCH, 2026)