Enhanced photoelectrochemical property of ZnO nanorods array synthesized on reduced graphene oxide for self-powered biosensing application

We have realized the direct synthesis of ZnO nanorods (ZnO NRs) array on reduced graphene layer (rGO), and demonstrated the enhanced photoelectrochemical (PEC) property of the rGO/ZnO based photoanode under UV irradiation compared with the pristine ZnO NRs array. The introduction of the rGO layer re...

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Bibliographic Details
Published in:Biosensors & bioelectronics 2015-02, Vol.64, p.499-504
Main Authors: Kang, Zhuo, Gu, Yousong, Yan, Xiaoqin, Bai, Zhiming, Liu, Yichong, Liu, Shuo, Zhang, Xiaohui, Zhang, Zheng, Zhang, Xueji, Zhang, Yue
Format: Article
Language:English
Subjects:
Arrays
Biosensing Techniques - instrumentation
Biosensors
Charge
Conductometry - instrumentation
Electrodes
Equipment Design
Equipment Failure Analysis
Glutathione
Glutathione - analysis
Glutathione - chemistry
Graphene
Graphite - chemistry
Luminescent Measurements - instrumentation
Nanorods
Nanostructure
Nanotubes - chemistry
Nanotubes - ultrastructure
Oxides - chemistry
Photoelectrochemical biosensor
Photoresponse
Reduced graphene oxide
Zinc oxide
Zinc Oxide - chemistry
ZnO nanorods array
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Summary:We have realized the direct synthesis of ZnO nanorods (ZnO NRs) array on reduced graphene layer (rGO), and demonstrated the enhanced photoelectrochemical (PEC) property of the rGO/ZnO based photoanode under UV irradiation compared with the pristine ZnO NRs array. The introduction of the rGO layer resulted in a favorable energy band structure for electron migration, which finally led to the efficient photoinduced charge separation. Such nanostructure was subsequently employed for self-powered PEC biosensing of glutathione in the condition of 0V bias, with a linear range from 10 to 200µM, a detection limit of 2.17µM, as well as excellent selectivity, reproducibility and stability. The results indicated the rGO/ZnO nanostructure is a competitive candidate in the PEC biosensing field. 1.ZnO NRs array was directly synthesized on the rGO layer.2.The introduction of rGO layer lead to the efficient photoinduced charge separation in ZnO.3.The self-powered PEC biosensing of glutathione at bias potential of 0V was realized.
ISSN:0956-5663
1873-4235
DOI:10.1016/j.bios.2014.09.055