DNA-based sensitization of Tb 3+ luminescence regulated by Ag + and cysteine: use as a logic gate and a H 2 O 2 sensor

A simple and facile strategy was developed for regulating the luminescence of Tb(3+) sensitized by DNA, in which Ag(+) and cysteine (Cys) act as activators. The Ag(+)/Cys-mediated reversible luminescence changes in the Tb(3+)-DNA sensing system enabled the design of a DNA INHIBIT logic gate and a H2O2 sensor in a time-resolved luminescence format.