Compact Surface Plasmon Resonance System with Au/Si Schottky Barrier
Ethanol concentration was quantified by the use of a compact surface plasmon resonance (SPR) system, which electrically detects hot electrons via a Schottky barrier. Although it is well known that SPR can be used as bio/chemical sensors, implementation is not necessarily practical, due to the size a...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-01-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/18/2/399 |
| _version_ | 1828118991993831424 |
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| author | Takuya Tsukagoshi Yuta Kuroda Kentaro Noda Nguyen Binh-Khiem Tetsuo Kan Isao Shimoyama |
| author_facet | Takuya Tsukagoshi Yuta Kuroda Kentaro Noda Nguyen Binh-Khiem Tetsuo Kan Isao Shimoyama |
| author_sort | Takuya Tsukagoshi |
| collection | DOAJ |
| description | Ethanol concentration was quantified by the use of a compact surface plasmon resonance (SPR) system, which electrically detects hot electrons via a Schottky barrier. Although it is well known that SPR can be used as bio/chemical sensors, implementation is not necessarily practical, due to the size and cost impediments associated with a system with variable wavelength or angle of incidence. However, scanning capability is not a prerequisite if the objective is to use SPR in a sensor. It is possible to build a small, inexpensive SPR sensor if the optics have no moving parts and a Schottky barrier is used for electrical current detection in place of a photodetector. This article reports on the design and performance of such a novel SPR sensor, and its application for quantifying ethanol concentration. As the concentration of ethanol is increased, the change in the angle dependence of the SPR current is observed. This change can be understood as a superposition of contributions of SPR coupled with the +3rd- and −3rd-order diffraction. Moreover, real-time monitoring of ethanol concentration was demonstrated using the proposed SPR system. |
| first_indexed | 2024-04-11T13:41:04Z |
| format | Article |
| id | doaj.art-b023bb8501424bd782e96bb543f9a36c |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T13:41:04Z |
| publishDate | 2018-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-b023bb8501424bd782e96bb543f9a36c2022-12-22T04:21:14ZengMDPI AGSensors1424-82202018-01-0118239910.3390/s18020399s18020399Compact Surface Plasmon Resonance System with Au/Si Schottky BarrierTakuya Tsukagoshi0Yuta Kuroda1Kentaro Noda2Nguyen Binh-Khiem3Tetsuo Kan4Isao Shimoyama5Information and Robot Technology Research Initiative, The University of Tokyo, Tokyo 113-8656, JapanDepartment of Mechano-Informatics, Graduate School of Information Science and Technology, The University of Tokyo, Tokyo 113-8656, JapanDepartment of Mechano-Informatics, Graduate School of Information Science and Technology, The University of Tokyo, Tokyo 113-8656, JapanDepartment of Mechano-Informatics, Graduate School of Information Science and Technology, The University of Tokyo, Tokyo 113-8656, JapanGraduate School of Informatics and Engineering, The University of Electro-Communications, Tokyo 182-8585, JapanInformation and Robot Technology Research Initiative, The University of Tokyo, Tokyo 113-8656, JapanEthanol concentration was quantified by the use of a compact surface plasmon resonance (SPR) system, which electrically detects hot electrons via a Schottky barrier. Although it is well known that SPR can be used as bio/chemical sensors, implementation is not necessarily practical, due to the size and cost impediments associated with a system with variable wavelength or angle of incidence. However, scanning capability is not a prerequisite if the objective is to use SPR in a sensor. It is possible to build a small, inexpensive SPR sensor if the optics have no moving parts and a Schottky barrier is used for electrical current detection in place of a photodetector. This article reports on the design and performance of such a novel SPR sensor, and its application for quantifying ethanol concentration. As the concentration of ethanol is increased, the change in the angle dependence of the SPR current is observed. This change can be understood as a superposition of contributions of SPR coupled with the +3rd- and −3rd-order diffraction. Moreover, real-time monitoring of ethanol concentration was demonstrated using the proposed SPR system.http://www.mdpi.com/1424-8220/18/2/399surface plasmon resonance (SPR)Schottky barrierdiffraction gratingchemical sensor |
| spellingShingle | Takuya Tsukagoshi Yuta Kuroda Kentaro Noda Nguyen Binh-Khiem Tetsuo Kan Isao Shimoyama Compact Surface Plasmon Resonance System with Au/Si Schottky Barrier Sensors surface plasmon resonance (SPR) Schottky barrier diffraction grating chemical sensor |
| title | Compact Surface Plasmon Resonance System with Au/Si Schottky Barrier |
| title_full | Compact Surface Plasmon Resonance System with Au/Si Schottky Barrier |
| title_fullStr | Compact Surface Plasmon Resonance System with Au/Si Schottky Barrier |
| title_full_unstemmed | Compact Surface Plasmon Resonance System with Au/Si Schottky Barrier |
| title_short | Compact Surface Plasmon Resonance System with Au/Si Schottky Barrier |
| title_sort | compact surface plasmon resonance system with au si schottky barrier |
| topic | surface plasmon resonance (SPR) Schottky barrier diffraction grating chemical sensor |
| url | http://www.mdpi.com/1424-8220/18/2/399 |
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