| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5031093 | Biosensors and Bioelectronics | 2017 | 10 Pages |
Abstract
An ultrasensitive sandwich-type electrochemical biosensor for DNA detection is developed based on spherical silicon dioxide/molybdenum selenide (SiO2@MoSe2) and graphene oxide-gold nanoparticles (GO-AuNPs) hybrids as carrier triggered Hybridization Chain Reaction (HCR) coupling with multi-signal amplification. The proposed sensoring assay utilizes a spherical SiO2@MoSe2/AuNPs as sensing platform and GO-AuNPs hybrids as carriers to supply vast binding sites. H2O2+HQ system is used for DNA detection and HCR as the signal and selectivity enhancer. The sensor is designed in sandwich type to increase the specificity. As a result, the present biosensor exhibits a good dynamic range from 0.1Â fM to 100Â pM with a low detection limit of 0.068Â fM (S/N=3). This work shows a considerable potential for quantitative detection of DNA in early clinical diagnostics.
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Authors
Hong-Lei Shuai, Xu Wu, Ke-Jing Huang, Zi-Bo Zhai,