Abstract
Because of its outstanding advantages, DNA strand displacement (DSD) reaction has been widely used for signals processing and molecular logic circuit constructing. Two digital logic circuits are constructed in this paper. One is the encoder circuit with four inputs and two outputs, and the other is the decoder circuit with two inputs and four outputs. Of particular interest to us is the multicolor fluorescent gold nanoprobe detection part, where a gold nanoparticle is modified with multicolor fluorophores which exploits the ultrahigh quenching ability of gold nanoparticles (AuNPs). Finally, the circuits can be programmed and simulated with the software Visual DSD. The simulated results based on DSD show that the molecular circuits constructed in this paper is reliable and effective, which has wide prospects in logical circuits and nano-electronics study.
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