Sensitivity enhancement of surface plasmon resonance biosensor based on graphene and barium titanate layers
| Autor: | Wei Du, Lili Liu, Meijie Liu, Maojin Yun, Peng Sun, Weijin Kong, Lipeng Jiao, Lifeng Dong, Mei Wang, Feng Xia |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
General Physics and Astronomy 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound Quality (physics) law Surface plasmon resonance business.industry Graphene Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Surfaces Coatings and Films Full width at half maximum chemistry Barium titanate Optoelectronics Prism 0210 nano-technology business Layer (electronics) Biosensor |
| Zdroj: | Applied Surface Science. 475:342-347 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2018.12.283 |
| Popis: | A surface plasmon resonance-based biosensor, consisting prism, silver, barium titanate (BaTiO3) and graphene layers, is presented by using angular interrogation. The structure is specially designed to further enhance the sensitivity and to decrease the full width at half maximum (FWHM) thereby improving the sensor performance. Theoretical analysis shows that the highest sensitivity can reach at 257°/RIU where the thickness of Ag layer is 45 nm with 10 nm BaTiO3 and one graphene layer. Compared with existing biosensors, the proposed biosensor exhibits higher sensitivity, lower FWHM and two times better preformation in the quality factor of the sensor, which would make our design have more applications in the field of biosensors. |
| Databáze: | OpenAIRE |
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