[18p-P04-1~15] 12.2 Characterization and Materials Physics

English Presentation

[18p-P04-12] Disposable Surface Plasmon Resonance Sensor Utilizing UiO-66-NH₂ Modification Surface for Heavy Metal Detection

〇(D)Wisansaya Jaikeandee¹, Chutiparn Lertvachirapaiboon², Dechnarong Pimalai², Kazunari Shinbo¹, Keizo Kato¹, Akira Baba¹ (1.Niigata Univ., 2.NANOTEC, THAILAND)

Keywords:

Disposable SPR sensor,UiO-66-NH2,Heavy metal detection

In this study, we developed a disposable surface plasmon resonance (SPR) sensor chip for heavy metal detection using UiO-66-NH₂modified on a Norland Optical Adhesive 61 (NOA 61) prism. NOA 61 prisms, with a diameter of 6 mm, were fabricated using confined sessile drop techniques. Subsequently, a 3 nm chromium (Cr) and 47 nm gold (Au) was deposited onto the NOA 61 prism before modification with UiO-66-NH₂. UiO-66-NH₂ is a metal-organic framework (MOF) which has a zirconium (Zr) as the metal center coordinated with 2-aminoterephthalic acid. UiO-66-NH₂ was dispersed in deionized (DI) water and then applied to the Au surface through spin-coating. This method resulted in a uniform particle distribution on the gold surface. The fabricated prism was integrated with a 3D-printed microfluidic cell to create a disposable SPR sensor. We evaluated the sensor's performance in detecting heavy metals using arsenate ions (HAsO₄^2-) at a 50 mg/mL concentration. The wavelength shifts for the disposable SPR sensor (NOA 61/Au), and the UiO-66-NH₂-modified disposable SPR sensor (NOA 61/Au/UiO-66-NH₂) were approximately 9.3 nm (Δλ₁) and 16.2 nm (Δλ₂), respectively. The significant wavelength shift observed for the UiO-66-NH₂-modified disposable SPR sensor chip enhances the adsorption capacity and sensitivity of the sensor compared with the unmodified version. This work introduces a novel and efficient approach to disposable sensors for heavy metal detection, offering reduced exposure and improved performance.