Label-free and enzyme-free platform for the construction of advanced DNA logic devices based on the assembly of graphene oxide and DNA-templated AgNCs.

DNA-based molecular logic computation has drawn extensive attention in bioanalysis, intelligent diagnostics of diseases and other nanotechnology areas. Herein, taking 2-to-1 and 4-to-2 encoders and a 1-to-2 decoder as model molecular logic devices, we for the first time combined the quenching ability of GO (graphene oxide) to DNA-templated AgNCs with G-quadruplex-enhanced fluorescence intensity of porphyrin dyes for the construction of label-free and enzyme-free dual-output advanced DNA molecular logic devices. Also, through the application of negative logic conversion to an XOR logic gate and combined with an INHIBIT logic gate, we also operated a label-free and enzyme-free comparator.

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