Eu(iii)-doped downconverting nanophosphors (GdVO4:Eu3+) for selective and sensitive detection of arsenic(iii) in water

This study presents a selective and sensitive photoluminescent nanosensor for As 3+ detection. DCNPs (GdVO 4 :Eu 3+ ) exhibit strong luminescence, quenched by As 3+ binding via aggregation. With a 39 nM detection limit, it ensures reliable arsenic sensing.