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- Wu, Xiu-Ming, et al. Show all 5 Authors
- Biosensors & bioelectronics 2016 v.81 pp. 214-220
- DNA; acids; bioassays; biocatalysis; biosensors; detection limit; fluorescence; graphene; quantum dots; recycling; wavelengths
- ... Herein, we report a ratiometric fluorescence assay based on graphene quantum dots (GQDs) for the ultrasensitive DNA detection by coupling the nicking endonuclease assisted target recycling and the G-quadruplex/hemin DNAzyme biocatalysis for cascade signal amplifications. With o-phenylenediamine acted as the substrate of G-quadruplex/hemin DNAzyme, whose oxidization product (that is, 2,3-diaminophe ...