Journal
APPLIED SURFACE SCIENCE
Volume 475, Issue -, Pages 342-347Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2018.12.283
Keywords
Surface plasmon resonance; Biosensor; Sensitivity; Graphene; Barium titanate
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Funding
- National Natural Science Foundation of China [51472174, 11144007, 11274188]
- Natural Science Foundation of Shandong Province [ZR2017MF059]
- Optoelectronics Think Tank Foundation of Qingdao
- Malmstrom Endowment Fund of Hamline University
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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 degrees/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.
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