Enzyme-free strip biosensor for amplified detection of Pb~(2+) based on a catalytic DNA circuit

摘要

A simple and enzyme-free strip biosensor for the amplified detection of Pb~(2+) has been constructed based on a catalytic DNA circuit. This assay is ultrasensitive, enabling the visual detection of Pb~(2+) concentrations as low as 10 pM without instrumentation.