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Nano Research 2016, 9(2): 344-352 https://doi.org/10.1007/s12274-015-0913-9
Research Article | Issue | Published: 18 November 2015

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

Show Author's Information Zhuo Kang1,  Xiaoqin Yan1,  Yunfei Wang1,  Yanguang Zhao1,  Zhiming Bai1,  Yichong Liu1,  Kun Zhao1,  Shiyao Cao1,  Yue Zhang1,2( )
State Key Laboratory for Advanced Metals and MaterialsSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing100083China
Key Laboratory of New Energy Materials and TechnologiesUniversity of Science and Technology BeijingBeijing100083China
Keywords:
photoelectrochemical, glutathione, biosensor, plasmonic gold nanoparticle, ZnO nanorod array
Cite this article:
Kang Z, Yan X, Wang Y, et al. Self-powered photoelectrochemical biosensing platform based on Au NPs@ZnO nanorods array. Nano Research, 2016, 9(2): 344-352. https://doi.org/10.1007/s12274-015-0913-9
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Abstract Full text Electronic supplementary material About this article

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.


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Electronic supplementary material
About this article

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

Show Author's information Zhuo Kang1, Xiaoqin Yan1, Yunfei Wang1, Yanguang Zhao1, Zhiming Bai1, Yichong Liu1, Kun Zhao1, Shiyao Cao1, Yue Zhang1,2( )
State Key Laboratory for Advanced Metals and MaterialsSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing100083China
Key Laboratory of New Energy Materials and TechnologiesUniversity of Science and Technology BeijingBeijing100083China

Abstract

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.

Keywords: photoelectrochemical, glutathione, biosensor, plasmonic gold nanoparticle, ZnO nanorod array

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Publication history
Copyright
Acknowledgements

Publication history

Received: 27 July 2015
Revised: 16 September 2015
Accepted: 28 September 2015
Published: 18 November 2015
Issue date: February 2016

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2015

Acknowledgements

Acknowledgements

This work was supported by the National Major Research Program of China (No. 2013CB932602), the Program of Introducing Talents of Discipline to Universities (No. B14003), the National Natural Science Foundation of China (No. 51232001 and 51527802), Beijing Municipal Science & Technology Commission, the Fundamental Research Funds for the Central Universities.

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