Synergistic ZnO-NiO composites for superior Fiber-Shaped Non-Enzymatic glucose sensing

초록

The rise in diabetes requires new glucose sensors, as traditional enzyme-based and planar electrodes are sensitiveto the environment and hard to integrate into wearables. This study addresses these issues by developing aflexible, non-enzymatic glucose sensor using a co-sputtered ZnO: NiO (NZ) composite on PET fiber. This designenhances the tensile strength (60 mm at 3.2 kg.f) and conductance (0.23 S) of Cu-coated PET fiber, forming adurable sensing platform. The electrode’s enhanced electrochemical surface area (0.13 cm2) offers abundantactive sites for glucose interaction, while the synergistic interface effect boosts ion and charge transport,improving glucose sensing. The sensor achieves high sensitivity (28.96 mA⋅cm 2⋅mM 1), fast response time (23s), and a low detection limit (0.25 mM), while maintaining 78 % of its sensitivity after 500 bending cycles. Thesefeatures, combined with good electrochemical stability—retaining 60 % of its initial performance after prolongedelectrolyte exposure—mark a significant advancement in wearable glucose monitoring.

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