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3D graphene foam/ZnO nanorods array mixed-dimensional heterostructure for photoelectrochemical biosensing

Abstract

We combined 3D graphene foam network with ZnO NRs array and further introduced such mixed-dimensional heterostructure into PEC biosensing system. The 3D graphene served as a conductive matrix, and provided extra-large spatial surface area for more effective ZnO NRs synthesis, while ZnO NRs array functioned as photoactive material to generate charge carriers and provided reaction sites at the surface for glutathione (GSH) oxidation. Therefore, the elevated photoresponse as well as improved PEC biosensing performance of linear range from 5 to 300 µM and an estimated detection limit of 1.53µM through 3σ was both acquired on the basis of the vast reactive surface area and efficient electron transfer of designed photoanode. The proposed strategy verified that such spatial bioactive platform is promising in biosensing related fields or other photoelectric energy conversion fields.

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Publication details

The article was received on 27 Oct 2017, accepted on 30 Nov 2017 and first published on 01 Dec 2017


Article type: Research Article
DOI: 10.1039/C7QI00669A
Citation: Inorg. Chem. Front., 2017, Accepted Manuscript
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    3D graphene foam/ZnO nanorods array mixed-dimensional heterostructure for photoelectrochemical biosensing

    Z. Kang, Y. Li, S. Cao, Z. Zhang, H. Guo, P. Wu, L. Zhou, S. Zhang, X. Zhang and Y. Zhang, Inorg. Chem. Front., 2017, Accepted Manuscript , DOI: 10.1039/C7QI00669A

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