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

Zhuo Kang; Yousong Gu; Xiaoqin Yan; Zhiming Bai; Yichong Liu; Shuo Liu; Xiaohui Zhang; Zheng Zhang; Xueji Zhang; Yue Zhang

doi:10.1016/j.bios.2014.09.055

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

Biosens Bioelectron. 2015 Feb 15:64:499-504. doi: 10.1016/j.bios.2014.09.055. Epub 2014 Sep 28.

Authors

Affiliations

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 Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
³ State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China; Key Laboratory of New Energy Materials and Technologies, University of Science and Technology Beijing, Beijing 100083, China. Electronic address: yuezhang@ustb.edu.cn.

PMID: 25299986
DOI: 10.1016/j.bios.2014.09.055

Abstract

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 0 V bias, with a linear range from 10 to 200 µM, a detection limit of 2.17 µM, as well as excellent selectivity, reproducibility and stability. The results indicated the rGO/ZnO nanostructure is a competitive candidate in the PEC biosensing field.

Keywords: Glutathione; Photoelectrochemical biosensor; Photoresponse; Reduced graphene oxide; ZnO nanorods array.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Biosensing Techniques / instrumentation*
Conductometry / instrumentation*
Electrodes
Equipment Design
Equipment Failure Analysis
Glutathione / analysis*
Glutathione / chemistry
Graphite / chemistry*
Luminescent Measurements / instrumentation*
Nanotubes / chemistry*
Nanotubes / ultrastructure
Oxides / chemistry
Zinc Oxide / chemistry*

Substances

Oxides
Graphite
Glutathione
Zinc Oxide