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<p>A novel and highly sensitive enzyme-free glucose sensor was designed using NiCo<sub>2</sub>O<sub>4</sub>/WS<sub>2</sub> (NCW) nanocomposites synthesized via a facile one-pot hydrothermal method. Structural and morphological studies indicate that NiCo<sub>2</sub>O<sub>4</sub> (NCO) nanospheres with a diameter of 50&#xa0;nm were formed on WS<sub>2</sub> nanosheets without significant aggregation. The electrochemical non-enzymatic glucose-sensing capability of the prepared nanocomposites was evaluated using cyclic voltammetry and amperometric <i>I</i> vs. <i>t</i> measurements. The NCW nanocomposite-modified electrochemical sensor exhibited a linear dependence over a wide linear range of 0.01–7&#xa0;mM with a high sensitivity of 2781 μA mM<sup>−1</sup>&#xa0;cm<sup>−2</sup>, a low limit of detection (LOD) of 4&#xa0;nM, and a rapid response time of 5&#xa0;s. The prepared glucose sensor exhibited good stability, excellent selectivity, and reproducibility. Our findings suggest that WS<sub>2</sub> incorporation into electroactive glucose-sensing materials could be a potential strategy for improving the performance of non-enzymatic glucose sensing.</p>

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Development of NiCo2O4/WS2 nanocomposites via facile synthesis for fast and sensitive non-enzymatic glucose detection

  • 期刊论文

  • 发表日期：

    2026年5月15日

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  • K. Sarathy,
  • K. C. Ramya,
  • S. Harikrishnan

摘要

A novel and highly sensitive enzyme-free glucose sensor was designed using NiCo2O4/WS2 (NCW) nanocomposites synthesized via a facile one-pot hydrothermal method. Structural and morphological studies indicate that NiCo2O4 (NCO) nanospheres with a diameter of 50 nm were formed on WS2 nanosheets without significant aggregation. The electrochemical non-enzymatic glucose-sensing capability of the prepared nanocomposites was evaluated using cyclic voltammetry and amperometric I vs. t measurements. The NCW nanocomposite-modified electrochemical sensor exhibited a linear dependence over a wide linear range of 0.01–7 mM with a high sensitivity of 2781 μA mM−1 cm−2, a low limit of detection (LOD) of 4 nM, and a rapid response time of 5 s. The prepared glucose sensor exhibited good stability, excellent selectivity, and reproducibility. Our findings suggest that WS2 incorporation into electroactive glucose-sensing materials could be a potential strategy for improving the performance of non-enzymatic glucose sensing.