Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7144027 | Sensors and Actuators B: Chemical | 2016 | 7 Pages |
Abstract
A dual enhancing strategy has been employed to develop electrochemical immunosensor for the ultrasensitive detection of AFP, which is enhanced by poly-dopamine functionalized N-doped multi-walled carbon nanotube (PDA-N-MWCNT) and the nanocomposite of graphene loaded Au@Pt mesoporous nanodendrites. The fabricated immunosensor exhibited a wide linear range of 0.1Â pg/mL-10Â ng/mL, with an ultralow detection limit of 0.05Â pg/mL. The good performance of the developed immunosensor could be contributed to (1) PDA-N-MWCNT supplied good biocompatible surface for immobilizing primary antibody (Ab1); (2) PDA-N-MWCNT modified electrode endowed more electrochemical active area, which can effectively improve the sensitivity of the immunosensor; (3) graphene could load high amount of good conductive and high electrocatalytic active Au@Pt nanodendrites for signal amplification. The results imply that the as-fabricated immunosensors have great potential for clinic usage.
Related Topics
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Authors
Lei Jiao, Zonggang Mu, Chengzhou Zhu, Qin Wei, He Li, Dan Du, Yuehe Lin,