| Autor: |
Vasimalla, Yesudasu, Singh, Shivam, Reddy, Ganta Raghotham, Kumar, Rajeev, Maloji, Suman, Kumar, Santosh |
| Zdroj: |
IEEE Sensors Journal; August 2024, Vol. 24 Issue: 15 p23738-23745, 8p |
| Abstrakt: |
Helicobacter pylori plays a significant role in the development of various gastrointestinal diseases. It is a form of bacteria that infects the first part of the small intestine (duodenum). This bacterium is a common cause of peptic ulcers. This article presents two surface plasmon resonance (SPR) sensors for the detection of H. pylori. Sensors 1 and 2 consist of a structure of prism-Ag–TiO2–graphene-BP–SM and prism-Au–TiO2–graphene-BP–SM, respectively. This work takes advantage of the excitement of surface plasmons and evanescent waves at the metal-dielectric interface. The angular interrogation technique is used to analyze the proposed sensors at a wavelength of 633 nm. Results show that sensor 1 furnishes the maximum sensitivity of 321.43°/RIU, quality factor (QF) of 57.09 RIU-1, dip of figure of merit (DFoM) of 5974.53, and combined sensitive factor (CSF) of 52.63, and sensor 2 endows the maximum sensitivity of 261.25°/RIU, QF of 30.41 RIU-1, DFoM of 22, 139, and CSF of 28.21. The results furnish a substantial improvement in comparison to the reported work in the literature. Finally, the field distributions of the proposed sensor are exhibited using the COMSOL software. |
| Databáze: |
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