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Microchimica Acta

, Volume 181, Issue 13–14, pp 1497–1503 | Cite as

Direct electrochemistry of glucose oxidase and a biosensor for glucose based on a glass carbon electrode modified with MoS2 nanosheets decorated with gold nanoparticles

  • Shao Su
  • Haofan Sun
  • Fei Xu
  • Lihui Yuwen
  • Chunhai FanEmail author
  • Lianhui WangEmail author
Original Paper

Abstract

An electrochemical glucose biosensor was developed by immobilizing glucose oxidase (GOx) on a glass carbon electrode that was modified with molybdenum disulfide (MoS2) nanosheets that were decorated with gold nanoparticles (AuNPs). The electrochemical performance of the modified electrode was investigated by cyclic voltammetry, and it is found that use of the AuNPs-decorated MoS2 nanocomposite accelerates the electron transfer from electrode to the immobilized enzyme. This enables the direct electrochemistry of GOx without any electron mediator. The synergistic effect the MoS2 nanosheets and the AuNPs result in excellent electrocatalytic activity. Glucose can be detected in the concentration range from 10 to 300 μM, and down to levels as low as 2.8 μM. The biosensor also displays good reproducibility and long-term stability, suggesting that it represents a promising tool for biological assays.

Figure

A MoS2-based glucose sensor has been prepared by gold nanoparticles-decorated MoS2 nanocomposite, which exhibited excellent electrocatalytic activity, reproducibility and long-term stability. It was applied to determine glucose concentration in human serum, suggest the sensor maybe promising for practical application.

Keywords

Molybdenum disulfide Glucose oxidase Gold nanoparticles Direct electrochemistry Biosensors 

Notes

Acknowledgments

This work was financially supported by the National Basic Research Program of China (2012CB933301, 2009CB930600), the National Natural Science Foundation of China (21305070, 21204038, 81273409), the Ministry of Education of China (IRT1148, 20123223110007, 20133223120013), the Natural Science Foundation of Jiangsu Province (BK20130861), the Scientific Research Foundation of Nanjing University of Posts and Telecommunications (NY212033), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the Open Research Fund of State Key Laboratory of Bioelectronics, Southeast University.

Supplementary material

604_2014_1178_MOESM1_ESM.doc (294 kb)
ESM 1 (DOC 293 kb)

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Copyright information

© Springer-Verlag Wien 2014

Authors and Affiliations

  1. 1.Key Laboratory for Organic Electronics & Information Displays (KLOEID), Institute of Advanced Materials (IAM), and School of Materials Science and EngineeringNanjing University of Posts & TelecommunicationsNanjingChina
  2. 2.Division of Physical Biology, Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghaiPeople’s Republic of China

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