Research Article

|

2016, 9(2): 344–352

|

https://doi.org/10.1007/s12274-015-0913-9

Self-powered photoelectrochemical biosensing platform based on Au NPs@ZnO nanorods array

Zhuo Kang1, Xiaoqin Yan1, Yunfei Wang1, Yanguang Zhao1, Zhiming Bai1, Yichong Liu1, Kun Zhao1, Shiyao Cao1, and Yue Zhang1,2 (*)

View Author's information

1 State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and
Technology Beijing, Beijing 100083, China
2 Key Laboratory of New Energy Materials and Technologies, University of Science and Technology Beijing, Beijing 100083, China

Keywords: plasmonic gold nanoparticle, ZnO nanorod array, photoelectrochemical, biosensor, glutathione
Full article PDF
Cite this article(Endnote)
Share this article
Metric

views: 158

Citations: 0

  • Abstract
  • References
  • Electronic Supplementary Material
Photoanodes, which are used in photoelectrochemical (PEC) water splitting, have been shown to be applicable in the construction of a PEC biosensing platform. This was realized by replacing water oxidization with oxidation of an appropriate test molecule. Here, we have demonstrated the feasibility of adopting photoanodes consisting of zinc oxide nanorods arrays decorated with plasmonic gold nanoparticles (Au NPs@ZnO NRs) for the self-powered PEC bioanalysis of glutathione (GSH) in phosphate-buffered saline (PBS) at an applied bias potential of 0 V vs. Ag/AgCl. This heterostructure exhibited enhanced PEC properties because of the introduction of the Au/ZnO interface. Under visible light illumination, hot electrons from surface-plasmon resonance (SPR) at the Au NP surface were injected into the adjacent ZnO and subsequently driven to the photocathode. Under ultraviolet (UV) light illumination, the photogenerated electrons in ZnO tended to transfer to the fluorine-doped tin oxide due to the step-wise energy band structure and the upward energy band bending at the ZnO/ electrolyte interface. These results indicate that plasmonic metal/semiconductor heterostructure photoanodes have great potential for self-powered PEC bioanalysis applications and extended field of other photovoltaic beacons.
Related Article
Cite this article

Self-powered photoelectrochemical biosensing platform based on Au NPs@ZnO nanorods array. Nano Res. 2016, 9(2): 344–352 https://doi.org/10.1007/s12274-015-0913-9

Download citation