Muhammad Fahmi Anuar, Yap Wing Fen, Josephine Liew Ying Chyi, Huda Abdullah, Ahmad Taufiq, Nurul Hidayat, Tan Sin Tee, Mohd Adzir Mahdi
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. © The Author(s) 2026.
Functional Nanotechnology Devices Laboratory (FNDL), Institute of Nanoscience and Nanotechnology, Serdang Selangor, (ION2) UPM 43400, Malaysia; Department of Physics, Faculty of Science, Universiti Putra Malaysia, Selangor, UPM Serdang, 43400, Malaysia; Department of Electrical, Electronic, and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia UKM, Selangor, Bangi, 43600, Malaysia; Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, Jl. Semarang, Malang, 65145, Indonesia; Wireless and Photonics Networks, Faculty of Engineering, Universiti Putra Malaysia, Selangor, UPM Serdang, 43400, Malaysia
