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<p>In this study, a straightforward and efficient approach is proposed for the direct synthesis of copper oxide nanosheets (CuNS) decorated with gold nanoparticles (GNPs) on the surface of printed circuit boards (PCBs) through a chemical process and sputtering technique. The resulting CuO/Au composite material serves as a sensing platform, exhibiting high sensitivity toward non-enzymatic glucose detection. The structure and morphology of the fabricated samples were characterized using XRD, XPS, and FE-SEM. The results demonstrate a morphological transition of the CuO nanomaterial from needle-like nanorods to nanosheets with increasing synthesis temperature from 10 to 50&#xa0;°C. The formation mechanism of the CuO nanosheets was also discussed. The CuO needle-like nanorods exhibit an average lateral size of approximately 100&#xa0;nm and a length in the range of 3–5&#xa0;µm. In contrast, the CuO nanosheets have a diameter of approximately 150&#xa0;nm, a thickness of around 40&#xa0;nm, and a uniform size distribution. Gold nanoparticles with a nanoscale dimension are uniformly distributed on the CuO nanosheets, as confirmed by scanning electron microscopy (SEM). The CuO nanosheets modified with gold nanoparticles (CuNS/GNPs) are utilized to detect glucose in solution with a sensitivity of up to 1840&#xa0;µA.mM<sup>–1</sup>&#xa0;cm<sup>–2</sup> and a detection limit as low as 40&#xa0;µM. The CuNS/GNPS sensor exhibited high durability, with repeatability reaching 98% after 15 cycles and maintaining 86% after 90 cycles. The CuNS/GNPs sensor also showed higher uniformity compared to the CuNS sensor of the same type, with relative standard deviations of 3.9% and 6.2%, respectively, calculated based on 15 electrodes of each type.</p>

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Direct growth of gold nanoparticles-decorated CuO nanosheets on printed circuit boards for non-enzymatic glucose detection

  • 期刊论文

  • 发表日期：

    2026年5月26日

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  • Canh Viet Nguyen,
  • Van-Phu Vu,
  • Luyen Thi Tran,
  • Hoang Vinh Tran,
  • Thanh Binh Nguyen,
  • Hop Thi Truong,
  • Quang Hoa Nguyen,
  • Phu Nguyen Van,
  • Ngoc Anh Thi Tran,
  • Nguyen Hai Pham,
  • An Bang Ngac,
  • Cong Doanh Sai

摘要

In this study, a straightforward and efficient approach is proposed for the direct synthesis of copper oxide nanosheets (CuNS) decorated with gold nanoparticles (GNPs) on the surface of printed circuit boards (PCBs) through a chemical process and sputtering technique. The resulting CuO/Au composite material serves as a sensing platform, exhibiting high sensitivity toward non-enzymatic glucose detection. The structure and morphology of the fabricated samples were characterized using XRD, XPS, and FE-SEM. The results demonstrate a morphological transition of the CuO nanomaterial from needle-like nanorods to nanosheets with increasing synthesis temperature from 10 to 50 °C. The formation mechanism of the CuO nanosheets was also discussed. The CuO needle-like nanorods exhibit an average lateral size of approximately 100 nm and a length in the range of 3–5 µm. In contrast, the CuO nanosheets have a diameter of approximately 150 nm, a thickness of around 40 nm, and a uniform size distribution. Gold nanoparticles with a nanoscale dimension are uniformly distributed on the CuO nanosheets, as confirmed by scanning electron microscopy (SEM). The CuO nanosheets modified with gold nanoparticles (CuNS/GNPs) are utilized to detect glucose in solution with a sensitivity of up to 1840 µA.mM–1 cm–2 and a detection limit as low as 40 µM. The CuNS/GNPS sensor exhibited high durability, with repeatability reaching 98% after 15 cycles and maintaining 86% after 90 cycles. The CuNS/GNPs sensor also showed higher uniformity compared to the CuNS sensor of the same type, with relative standard deviations of 3.9% and 6.2%, respectively, calculated based on 15 electrodes of each type.