Publication: Zeolitic-Imidazolate Frameworks Enhanced Surface Plasmon Resonance Sensor for Organic Dyes Sensing
Date
2024
Authors
Azeman N.H.
Zain A.R.M.
Daniyal W.M.E.M.M.
Jamil M.S.M.
Bakar M.H.A.
Nazri N.A.A.
Khushaini M.A.A.
Mokhtar M.H.H.
Bakar A.A.A.
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers Inc.
Abstract
This work highlights the development of zeolitic-imidazolate frameworks 8 (ZIFs-8) to enhance surface plasmon resonance (SPR) sensor for methylene blue compound detection. ZIF-8 was synthesized via the solvothermal method. XRD results show the appearance of diffraction peaks at 2?= 7.4�, 10.4�, 12.7�, and 18.0�, which are assigned to 011, 002, 112, 022, 013, and 222 lattice planes, respectively, confirming the high crystalline ZIF-8 produced. The X-ray photoelectron spectroscopy (XPS) analysis exhibits the presence of C, O, Zn, and N elements on the surface of the ZIF-8 structure. Methylene blue was detected through the donor-acceptor interaction of a lone pair of Zn atoms in ZIF-8 with methylene blue. These two materials can also interact through �-� interactions because both ZIF-8 and methylene blue possess aromatic rings in their structure. The FESEM characterization shows a uniform particle size produced on a surface of Au thin film in the 100-130-nm range. A good sensitivity of 1.3821� ppm-1 with a detection and quantification limit of 0.92 and 2.79 ppm, respectively, was obtained for the SPR sensor using ZIF-8 as a sensing material at a low methylene blue concentration range in comparison to bare Au. Nonetheless, the steepness of the graph started to decline after 1 ppm methylene blue concentration due to the fully occupied active sites on the surface of ZIF-8. In the selectivity study, a prominent SPR shift was observed when ZIF-8 interacted with methylene blue, compared to other interferences, proving that ZIF-8 has a good selectivity toward methylene blue. ? 2001-2012 IEEE.
Description
Keywords
Aromatic compounds , Crystalline materials , Organic polymers , Organometallics , Particle size , Zinc , Compound , Metalorganic frameworks (MOFs) , Methylene Blue , Organic dye , Surface-plasmon , Surface-plasmon resonance , Vibration , Zeolitic imidazolate framework-8 , Zeolitic imidazolate frameworks , Zinc , Surface plasmon resonance