The hybridization reaction was maintained at a temperature of 45 ◦C for 1 h in an incubator.
After hybridization, the MNP-2pDNA/tDNA was washed twice with the assay buffer, then resuspended in 200L assay buffer.
Meanwhile, the functionalized 1pDNA-AuNP-bDNA-NTs complex was centrifuged at 13,000rpm for 20 min and the unreacted thiolated oligonucleotides in the supernatant were removed.