Graphene–bimetal plasmonic platform for ultra-sensitive biosensing
A graphene–bimetal plasmonic platform for surface plasmon resonance biosensing with ultra-high sensitivity was proposed and optimized. In this hybrid configuration, graphene nanosheets was employed to effectively absorb the excitation light and serve as biomolecular recognition elements for increase...
| Main Authors: | , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/137735 |
| _version_ | 1826116930731245568 |
|---|---|
| author | Tong, Jinguang Jiang, Li Chen, Huifang Wang, Yiqin Yong, Ken-Tye Forsberg, Erik He, Sailing |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Tong, Jinguang Jiang, Li Chen, Huifang Wang, Yiqin Yong, Ken-Tye Forsberg, Erik He, Sailing |
| author_sort | Tong, Jinguang |
| collection | NTU |
| description | A graphene–bimetal plasmonic platform for surface plasmon resonance biosensing with ultra-high sensitivity was proposed and optimized. In this hybrid configuration, graphene nanosheets was employed to effectively absorb the excitation light and serve as biomolecular recognition elements for increased adsorption of analytes. Coating of an additional Au film prevents oxidation of the Ag substrate during manufacturing process and enhances the sensitivity at the same time. Thus, a bimetal Au–Ag substrate enables improved sensing performance and promotes stability of this plasmonic sensor. In this work we optimized the number of graphene layers as well as the thickness of the Au film and the Ag substrate based on the phase-interrogation sensitivity. We found an optimized configuration consisting of 6 layers of graphene coated on a bimetal surface consisting of a 5 nm Au film and a 30 nm Ag film. The calculation results showed the configuration could achieve a phase sensitivity as high as 1.71×106 deg/RIU, which was more than 2 orders of magnitude higher than that of bimetal structure and graphene–silver structure. Due to this enhanced sensing performance, the graphene–bimetal plasmonic platform proposed in this paper is potential for ultra-sensitive plasmonic sensing. |
| first_indexed | 2024-10-01T04:19:28Z |
| format | Journal Article |
| id | ntu-10356/137735 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:19:28Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1377352020-04-13T03:01:37Z Graphene–bimetal plasmonic platform for ultra-sensitive biosensing Tong, Jinguang Jiang, Li Chen, Huifang Wang, Yiqin Yong, Ken-Tye Forsberg, Erik He, Sailing School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Graphene Bimetal Substrate A graphene–bimetal plasmonic platform for surface plasmon resonance biosensing with ultra-high sensitivity was proposed and optimized. In this hybrid configuration, graphene nanosheets was employed to effectively absorb the excitation light and serve as biomolecular recognition elements for increased adsorption of analytes. Coating of an additional Au film prevents oxidation of the Ag substrate during manufacturing process and enhances the sensitivity at the same time. Thus, a bimetal Au–Ag substrate enables improved sensing performance and promotes stability of this plasmonic sensor. In this work we optimized the number of graphene layers as well as the thickness of the Au film and the Ag substrate based on the phase-interrogation sensitivity. We found an optimized configuration consisting of 6 layers of graphene coated on a bimetal surface consisting of a 5 nm Au film and a 30 nm Ag film. The calculation results showed the configuration could achieve a phase sensitivity as high as 1.71×106 deg/RIU, which was more than 2 orders of magnitude higher than that of bimetal structure and graphene–silver structure. Due to this enhanced sensing performance, the graphene–bimetal plasmonic platform proposed in this paper is potential for ultra-sensitive plasmonic sensing. 2020-04-13T03:01:37Z 2020-04-13T03:01:37Z 2018 Journal Article Tong, J., Jiang, L., Chen, H., Wang, Y., Yong, K.-T., Forsberg, E., & He, S. (2018). Graphene–bimetal plasmonic platform for ultra-sensitive biosensing. Optics Communications, 410, 817-823. doi:10.1016/j.optcom.2017.11.039 0030-4018 https://hdl.handle.net/10356/137735 10.1016/j.optcom.2017.11.039 2-s2.0-85035815281 410 817 823 en Optics Communications © 2017 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Electrical and electronic engineering Graphene Bimetal Substrate Tong, Jinguang Jiang, Li Chen, Huifang Wang, Yiqin Yong, Ken-Tye Forsberg, Erik He, Sailing Graphene–bimetal plasmonic platform for ultra-sensitive biosensing |
| title | Graphene–bimetal plasmonic platform for ultra-sensitive biosensing |
| title_full | Graphene–bimetal plasmonic platform for ultra-sensitive biosensing |
| title_fullStr | Graphene–bimetal plasmonic platform for ultra-sensitive biosensing |
| title_full_unstemmed | Graphene–bimetal plasmonic platform for ultra-sensitive biosensing |
| title_short | Graphene–bimetal plasmonic platform for ultra-sensitive biosensing |
| title_sort | graphene bimetal plasmonic platform for ultra sensitive biosensing |
| topic | Engineering::Electrical and electronic engineering Graphene Bimetal Substrate |
| url | https://hdl.handle.net/10356/137735 |
| work_keys_str_mv | AT tongjinguang graphenebimetalplasmonicplatformforultrasensitivebiosensing AT jiangli graphenebimetalplasmonicplatformforultrasensitivebiosensing AT chenhuifang graphenebimetalplasmonicplatformforultrasensitivebiosensing AT wangyiqin graphenebimetalplasmonicplatformforultrasensitivebiosensing AT yongkentye graphenebimetalplasmonicplatformforultrasensitivebiosensing AT forsbergerik graphenebimetalplasmonicplatformforultrasensitivebiosensing AT hesailing graphenebimetalplasmonicplatformforultrasensitivebiosensing |