Citation: MENG Wei-Chen, WANG Qing-Xiang, LI Yan-Zhao, FENG Ling-Zhu, LANG Ming-Fei, CHEN Hong-Shen, SUN Jing. Flexible Palladium-silver Nanowire Electrode for Non-enzymatic Glucose Detection[J]. Chinese Journal of Analytical Chemistry, ;2020, 48(3): 363-370. doi: 10.19756/j.issn.0253-3820.191672 shu

Flexible Palladium-silver Nanowire Electrode for Non-enzymatic Glucose Detection

1.
College of Environmental and Chemical Engineering, Dalian University, Dalian 116622, China;
2.
Affiliated Zhongshan Hospital, Dalian University, Dalian 116622, China;
3.
College of Medicine, Dalian University, Dalian 116622, China

Received Date: 14 November 2019
Revised Date: 26 December 2019

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 21505013), the Liaoning BaiQian Wan Talents Program (No.[2019]45), and the Dalian Medical Science Research Project (Nos. 1811106, 1811121)

Diabetes has become a prominent issue that threatens human's health. Minimally invasive blood glucose testing may cause inconvenience and pain to patients. Wearable non-invasive blood glucose testing is becoming a hot topic in the scientific and medical field. In this study, novel palladium-silver nanowires (Pd-AgNWs) flexible electrodes were prepared by electrochemical deposition of Pd nanoparticles on the electrode with polydimethylsiloxane (PDMS) as the substrate and AgNWs as the conductive layer. The nanoparticles were uniformly deposited on AgNWs and different Pd-AgNWs electrodes were made by changing Pd deposition cycles. By using them as the working electrodes, glucose was detected by cyclic voltammetry. It was found that the Pd-AgNWs electrode deposited with 25 cycles of palladium had the best results in the detection of glucose. The experimental conditions of glucose detection were optimized. The linear ranges of glucose were 0.02-0.5 mmol/L and 1-4 mmol/L when detecting glucose by current-time method. The detection limit was 1 μmol/L and the response sensitivity was 33.18 μA/(cm²(mmol/L)) (S/N=3). This electrode exhibited good reproducibility, stability, selectivity, as well as good response in detection of salivary glucose.
- Flexible electrode,
- Enzyme-free biosensors,
- Silver nanowire,
- Glucose
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沈阳化工大学材料科学与工程学院沈阳 110142