Construction of Flexible Electrode Using Carbon Nanofibers/Pt Nanosheets for Glucose Detection
ZHANG Jiaojiao1, WANG Xiaojun2,*, ZHANG Zhuoya1
1 College of Biomedical Engineering, Taiyuan University of Technology, Jinzhong 030600, Shanxi, China 2 College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Abstract: Diabetes is a metabolic disease characterized by hyperglycemia, which seriously threatens human health. Blood glucose monitoring plays an important role in the prevention, diagnosis and treatment of diabetes. The flexible carbon nanofibers were prepared by combination of electrospinning and heat treatment using polyacrylonitrile as the carbon source. Subsequently, the nonenzyme glucose sensor was constructed by loading Pt nanosheets directly on the surface of self-supporting carbon nanofibers by potentiostatic electrodeposition method. The results indicated that the surface of the nanofibers was smooth, and the Pt nanosheets gradually grew to fill the gap of carbon nanofibers. The length of single nanosheet was 100—200 nm, and the width was about 100 nm. The electrochemical results indicated that the linear detection range of the nonenzyme glucose biosensor electrode was 7.5—87.5 mmol/L with a low detection limit of 14.04 μmol/L and a sensitivity of 6.41 μA·(mmol/L)-1·cm-2. In addition, the sensor showed the excellent anti-interference ability, high repeatability and excellent storage stability. The fabricated sensor can combine the advantages of flexible electrode and nonenzyme sensor, and provides the possibility for the construction of flexible glucose sensor.
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