Citation: XU Jie, SUN Wen, HE Lu-Ying, ZHANG Qin, SU Wen-Jin. Preparation of Graphene/Gold Nanoparticles/Glucose Oxidase Flexible Electrode Based on Poly(ethylene terephthalate) Film and Its Application in Detection of Glucose[J]. Chinese Journal of Analytical Chemistry, ;2017, 45(8): 1227-1232. doi: 10.11895/j.issn.0253-3820.170335 shu

Preparation of Graphene/Gold Nanoparticles/Glucose Oxidase Flexible Electrode Based on Poly(ethylene terephthalate) Film and Its Application in Detection of Glucose

College of Food and Biological Engineering, Jimei University, Xiamen 361021, China

Received Date: 26 May 2017
Revised Date: 16 June 2017

Fund Project: This work was supported by the National Natural Science Foundation of China (No.21101073)

The graphene prepared by chemical vapor deposition onto copper foils was transferred onto a poly(ethylene terephthalate) (PET) soft substrate by the aid of poly-methyl methacrylate (PMMA). The soft G/AuNPs/GOD composite electrode based on PET substrate was fabricated using a protocol in which the uniform distribution of Au nanoparticles (AuNPs) was firstly obtained by controlling the evaporation of gold sol on a graphene surface, then thioglycolic acid (TGA) was modified on the AuNPs through Au-S bond, and finally glucose oxidase (GOD) was immobilized on the surface of AuNPs through acylation reaction between TGA and the GOD. Glucose was detected in the linear range from 0.05 to 10.55 mmol/L with a linear correlation coefficient (r) of 0.9955. The detection was performed in phosphate buffer solution (pH 7) at 25℃ with a working potential of 0.6 V (vs.SCE electrode), and the detection limit was 1 μmol/L (3σ). The G/AuNPs/GOD flexible electrode based on PET substrate provided a new pathway to detect glucose in special environments using wearable equipment, which enlarged the applied field of glucose detection.
- Glucose,
- Soft electrode,
- Glucose oxidase,
- Graphene,
- Gold nanoparticles
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