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<p>ZIF-8 was successfully synthesised with a rhombic dodecahedral morphology, an average particle size of 262.60 ± 44.21&#xa0;nm, a predominantly microporous framework, and a high surface area of 991.81&#xa0;m<sup>2</sup>/g. These structural features provide abundant adsorption sites, making ZIF-8 a suitable candidate for metal ion sensing. Integrated onto a gold SPR platform, the Au/ZIF-8 sensing layer exhibited clear resonance angle shifts toward higher angles in response to increasing Sb3⁺ concentrations. The sensor achieved a strong linear response (R2 = 0.95), a sensitivity of 0.057°ppm<sup>−1</sup>, and a binding affinity constant of 1.202&#xa0;ppm<sup>−1</sup>, demonstrating efficient interaction between ZIF-8 and Sb<sup>3+</sup> ions. Overall, the physical, chemical, and optical properties of ZIF-8, together with its good reproducibility, make it a strong candidate for SPR-based antimony detection.</p>

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Microporous ZIF-8 nanocoating as a sensitive interface for SPR detection of antimony (III)

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月14日

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  • Muhammad Fahmi Anuar,
  • Yap Wing Fen,
  • Josephine Liew Ying Chyi,
  • Huda Abdullah,
  • Ahmad Taufiq,
  • Nurul Hidayat,
  • Tan Sin Tee,
  • Mohd Adzir Mahdi

摘要

ZIF-8 was successfully synthesised with a rhombic dodecahedral morphology, an average particle size of 262.60 ± 44.21 nm, a predominantly microporous framework, and a high surface area of 991.81 m2/g. These structural features provide abundant adsorption sites, making ZIF-8 a suitable candidate for metal ion sensing. Integrated onto a gold SPR platform, the Au/ZIF-8 sensing layer exhibited clear resonance angle shifts toward higher angles in response to increasing Sb3⁺ concentrations. The sensor achieved a strong linear response (R2 = 0.95), a sensitivity of 0.057°ppm−1, and a binding affinity constant of 1.202 ppm−1, demonstrating efficient interaction between ZIF-8 and Sb3+ ions. Overall, the physical, chemical, and optical properties of ZIF-8, together with its good reproducibility, make it a strong candidate for SPR-based antimony detection.