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<p>Excessive glucose intake may be associated with an increased risk of metabolic illness. This study presents a hydrothermally prepared chemi-capacitive sensor composed of ZnO/Fe<sub>2</sub>O<sub>3</sub>-nanocomposite using a green synthesis approach. The material is defined by its distinctive features obtained by XRD analysis, SEM imaging, EDX spectra analysis, UV–Vis absorption spectra analysis and FTIR analysis, which show evidence of its effective synthesis. Comprehensive studies are subsequently conducted to investigate the sensor’s chemi-capacitive behaviour to D-glucose (0.25–10&#xa0;µM). The sensor exhibits an exceptional sensitivity of 0.97&#xa0;µF/µM and a significantly lower minimum detection limit of 0.35&#xa0;µM, with a rapid response time varying from a minimum of 2&#xa0;s to a maximum of 10&#xa0;s. It exhibits excellent reproducibility (% RSD = 2.99%), selectivity as well as sustainable stability for up to 16&#xa0;weeks; enabling efficient and fast and in situ measurement of glucose levels. The results are analysed utilizing fundamental research and theories.</p>

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Exploring the binary non-enzymatic composite of ZnO/Fe2O3 for chemi-capacitive glucose sensing

  • 期刊论文

  • 发表日期：

    2026年5月22日

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  • Karen Das,
  • Shyamaljyoti Gogoi,
  • Pritymala Basumatary,
  • Priyanka Kakoty

摘要

Excessive glucose intake may be associated with an increased risk of metabolic illness. This study presents a hydrothermally prepared chemi-capacitive sensor composed of ZnO/Fe2O3-nanocomposite using a green synthesis approach. The material is defined by its distinctive features obtained by XRD analysis, SEM imaging, EDX spectra analysis, UV–Vis absorption spectra analysis and FTIR analysis, which show evidence of its effective synthesis. Comprehensive studies are subsequently conducted to investigate the sensor’s chemi-capacitive behaviour to D-glucose (0.25–10 µM). The sensor exhibits an exceptional sensitivity of 0.97 µF/µM and a significantly lower minimum detection limit of 0.35 µM, with a rapid response time varying from a minimum of 2 s to a maximum of 10 s. It exhibits excellent reproducibility (% RSD = 2.99%), selectivity as well as sustainable stability for up to 16 weeks; enabling efficient and fast and in situ measurement of glucose levels. The results are analysed utilizing fundamental research and theories.