A label-free DNA biosensor with high sensitivity and selectivity is constructed by using DNA–Ag NCs and Exo III-catalyzed target recycling amplification.
An immobilization-free and label-free PEC aptasensing strategy has been developed, with methylene blue in homogeneous solution as a photoactive probe and bare ITO glass as a working electrode and ultrasensitive and highly specific Hg2+ analysis is successfully achieved.
A Label-free and Turn-on Fluorescence Strategy for DNA Detection with a Wide Detection Range Based on Exonuclease III-aided Target Recycling Amplification