A Hybrid-Monolayer Fluorescence Probe Towards the Detection of Ultratrace Co~(2+) Ion at Surface of SiO2 Nanoparticles

摘要

This paper reports a resonance energy transfer-amplifying fluorescence quenching at the surface of silica nanoparticles for the ultrasensitive and ultratrace detection of Co~(2+) ion in solution. The nanoparticle-assembled arrays on silicon wafer can sensitively detect down to ca. 1 nM Co~(2+) with the use of only 10 μL of solution (ca. 60 pg Co~(2+)).