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- W2053202993 abstract "A sensitive electrochemical DNA biosensor based on the amplification of Au nanoparticles (AuNPs) has been developed. The AuNPs were modified with two types of signaling reporter DNAs, i.e. a methylene blue probe (MB-probe 2-SH) and T10 with a methylene blue signaling molecule (MB-T10-SH), forming DNA–AuNP conjugates. The MB-probe 2-SH is complementary to the target DNA, while MB-T10-SH is not. The presence of MB-T10-SH reduces the cross-reaction between target DNA and MB-probe 2-SH on the AuNPs, resulting in increased sensitivity of the biosensor. In our assay, the DNA sensor is fabricated by immobilizing a capture probe on the surface of the Au electrode, which then hybridizes with the corresponding target DNA, and further hybridizes with a DNA–Au conjugate. The signal of MB is measured by differential pulse voltammetry, while the DNA–Au conjugate enables the detection of target DNA in the linear range of 10−13 to 10−8 M with the detection limit as low as 50 fM." @default.
- W2053202993 created "2016-06-24" @default.
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- W2053202993 date "2014-01-01" @default.
- W2053202993 modified "2023-10-14" @default.
- W2053202993 title "Amplified detection of femtomolar DNA based on a one-to-few recognition reaction between DNA–Au conjugate and target DNA" @default.
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- W2053202993 doi "https://doi.org/10.1039/c3nr05625b" @default.
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