JJournal of Colloid and Interface Science3/24/2026Nitrogen-doped carbon dots in Na2B4O7 matrix: Excitation-dependent phosphorescence for multi-level encryptionShanshan Li·Yang Fu·Dongyang Liu·Wen Li·Cheng Zhang·Yu Wang·Fanyong YanRead at Journal of Colloid and Interface ScienceTagsCarbon and Quantum Dots ApplicationsMaterials Chemistry