A reusable biosensor for detecting mercury(Ⅱ) at the subpicomolar level based on 'turn-on' resonance light scattering

摘要

A reusable sensing strategy employing magnetic nanoparticles and thymine-containing aptamers was developed to detect Hg~(2+) in real water samples based on "turn-on" resonance light scattering.The LOD was as low as 500 f M (S/N = 3), and the present sensor can be repeatedly used for at least seven cycles.