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. 2021 May 2;8:13. doi: 10.1186/s40580-021-00263-w

Fig. 3.

Fig. 3

a Fluorescent carbon dots (CDs) coupled to a DNA probe are quenched by gold nanoparticles (Au) or MnO2 nanosheets, phenomenon that is then hindered by hybridization of miRNA target. b DNA-carbon nanotubes with T7 exonuclease-assisted or DSN-assisted target recycling were used for the electrochemical or fluorometric detection of miRNA. CNT carbon nanotube, exo exonuclease, FRET fluorescence energy transfer, DSN duplex-specific nuclease