Strand exchange reaction modulated fluorescence off-on switching of hybridized DNA duplex stabilized silver nanoclusters

The fluorescence (FL)off-on switching of designed DNA duplex stabilized silver nanoclusters can be accomplished through the control of DNA strand exchange reaction. The successful sequential control of the FL emission of silver nanoclusters in off-on switching cycles confirms that the DNA duplex stabilized silver nanoclusters can work as a new kind of DNA FL switch.