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Bioelectrochemistry

Bioelectrochemistry

IF: 4.8
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Highly stretchable, adhesive and conductive hydrogel for flexible and stable bioelectrocatalytic sensing layer of enzyme-based amperometric glucose biosensor

Published:6 December 2024 DOI: 10.1016/j.bioelechem.2024.108882 PMID: 39671904
Linghui Tang,?Yufeng Huang,?Yue Wang,?Jifan Zhao,?Huiyong Lian,?Yan Dong,?Zhiqiang Zhang,?Yasushi Hasebe

Abstract

Highly stretchable, adhesive and conductive triblock hydrogel was synthesized and utilized as a flexible and stable bioelectrocatalytic sensing layer of enzyme-based amperometric glucose biosensor. The hydrogel was prepared through one-pot polymerization of 2-acrylamido-2-methyl-1-propanesulfonic acid, methacrylamide, and hydroxyethyl methacrylate. The physical and chemical properties of the hydrogel were characterized with X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and electrochemical techniques. Glucose oxidase (GOx) and chitosan (CTS) embedded hydrogel was drop-coated on glassy carbon electrode (GCE) and screen printed graphite electrode (SPGE). The resulting GOx/CTS/hydrogel-GCE and GOx/CTS/hydrogel-SPGE exhibited excellent mediated bioelectrocatalytic oxidation current for glucose. The calibration curve of glucose by the GOx/CTS/hydrogel-GCE showed the linear range from 0.25 to 15 mM with the sensitivity of 27.0 μA mM-1 cm-2. This GOx/CTS/hydrogel-based sensing layer coated on the SPGE was stable against bending, and the response to glucose was almost same irrespective of the bending angles (0, 30, 60, and 90 degree). In addition, the response to glucose was not interfered by various organic and inorganic interfering species, allowed to detect glucose in goat serum. Furthermore, the GOx/CTS/hydrogel-GCE kept its original activity of 99.64?% during 30?days' storage under dry state in refrigerator.

Substances (9)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Glycerol 56-81-5 C3H8O3 2251 suppliers $5.00-$6910.00
Ascorbic Acid 50-81-7 C6H8O6 1968 suppliers $6.00-$2380.00
Potassium chloride 7447-40-7 KCl 1594 suppliers $6.00-$12480.00
D(+)-Glucose 50-99-7 C6H12O6 1452 suppliers $6.00-$26950.00
D(-)-Fructose 57-48-7 C6H12O6 807 suppliers $12.00-$30100.00
2-Hydroxyethyl methacrylate 868-77-9 C6H10O3 694 suppliers $7.00-$784.00
Phytic acid 83-86-3 C6H18O24P6 675 suppliers $6.00-$5058.90
beta-D-Fructopyranose 7660-25-5 C6H12O6 316 suppliers Inquiry
3-Hydroxytyramine 51-61-6 C8H11NO2 200 suppliers Inquiry

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