GeSe nanosheets modified surface plasmon resonance sensors for enhancing sensitivity
Germanium selenide (GeSe) nanosheets are stable and inexpensive and considered to have a great potential for photovoltaic applications, however we have demonstrated that GeSe nanosheets are also promising for sensing technology, in this paper. By spin-coating the GeSe nanosheets on the surface of no...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2020-02-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | http://www.degruyter.com/view/j/nanoph.2020.9.issue-2/nanoph-2019-0170/nanoph-2019-0170.xml?format=INT |
| _version_ | 1818878521474285568 |
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| author | Zhao Yuting Gan Shuaiwen Wu Leiming Zhu Jiaqi Xiang Yuanjiang Dai Xiaoyu |
| author_facet | Zhao Yuting Gan Shuaiwen Wu Leiming Zhu Jiaqi Xiang Yuanjiang Dai Xiaoyu |
| author_sort | Zhao Yuting |
| collection | DOAJ |
| description | Germanium selenide (GeSe) nanosheets are stable and inexpensive and considered to have a great potential for photovoltaic applications, however we have demonstrated that GeSe nanosheets are also promising for sensing technology, in this paper. By spin-coating the GeSe nanosheets on the surface of noble metal (Au), we have obtained a surface plasmon resonance (SPR) sensor with significantly enhanced sensitivity, and the performance of the sensor is closely related to the thickness of the GeSe film. By detecting different refractive index solutions, we have obtained the optimized sensitivity with 3581.2 nm/RIU (which is nearly 80% improvement compared to traditional SPR sensors) and figure of merit with 14.37 RIU−1. Moreover, the proposed SPR sensor was vastly superior in sensing Pb2+ heavy metal ions after coating it with chitosan and GeSe composite. A maximum sensitivity of 30.38 nm/μg/l has been verified, which is nearly six times better than that of conventional SPR sensor. Our results demonstrated that GeSe nanosheets overlayer with modified SPR sensor has its great potential in heavy metal detection and chemical-specific molecular identification. |
| first_indexed | 2024-12-19T14:15:30Z |
| format | Article |
| id | doaj.art-ff336ec4f7cd47ffb8cdc71465979593 |
| institution | Directory Open Access Journal |
| issn | 2192-8614 |
| language | English |
| last_indexed | 2024-12-19T14:15:30Z |
| publishDate | 2020-02-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj.art-ff336ec4f7cd47ffb8cdc714659795932022-12-21T20:18:00ZengDe GruyterNanophotonics2192-86142020-02-019232733610.1515/nanoph-2019-0170nanoph-2019-0170GeSe nanosheets modified surface plasmon resonance sensors for enhancing sensitivityZhao Yuting0Gan Shuaiwen1Wu Leiming2Zhu Jiaqi3Xiang Yuanjiang4Dai Xiaoyu5SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Institute of Microscale Optoelectronics (IMO), Shenzhen University, Shenzhen 518060, ChinaSZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Institute of Microscale Optoelectronics (IMO), Shenzhen University, Shenzhen 518060, ChinaSZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Institute of Microscale Optoelectronics (IMO), Shenzhen University, Shenzhen 518060, ChinaSZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Institute of Microscale Optoelectronics (IMO), Shenzhen University, Shenzhen 518060, ChinaSZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Institute of Microscale Optoelectronics (IMO), Shenzhen University, Shenzhen 518060, ChinaSZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Institute of Microscale Optoelectronics (IMO), Shenzhen University, Shenzhen 518060, ChinaGermanium selenide (GeSe) nanosheets are stable and inexpensive and considered to have a great potential for photovoltaic applications, however we have demonstrated that GeSe nanosheets are also promising for sensing technology, in this paper. By spin-coating the GeSe nanosheets on the surface of noble metal (Au), we have obtained a surface plasmon resonance (SPR) sensor with significantly enhanced sensitivity, and the performance of the sensor is closely related to the thickness of the GeSe film. By detecting different refractive index solutions, we have obtained the optimized sensitivity with 3581.2 nm/RIU (which is nearly 80% improvement compared to traditional SPR sensors) and figure of merit with 14.37 RIU−1. Moreover, the proposed SPR sensor was vastly superior in sensing Pb2+ heavy metal ions after coating it with chitosan and GeSe composite. A maximum sensitivity of 30.38 nm/μg/l has been verified, which is nearly six times better than that of conventional SPR sensor. Our results demonstrated that GeSe nanosheets overlayer with modified SPR sensor has its great potential in heavy metal detection and chemical-specific molecular identification.http://www.degruyter.com/view/j/nanoph.2020.9.issue-2/nanoph-2019-0170/nanoph-2019-0170.xml?format=INTgermanium selenidesurface plasmon resonance sensorsensitivitypb2+ heavy metal ions |
| spellingShingle | Zhao Yuting Gan Shuaiwen Wu Leiming Zhu Jiaqi Xiang Yuanjiang Dai Xiaoyu GeSe nanosheets modified surface plasmon resonance sensors for enhancing sensitivity Nanophotonics germanium selenide surface plasmon resonance sensor sensitivity pb2+ heavy metal ions |
| title | GeSe nanosheets modified surface plasmon resonance sensors for enhancing sensitivity |
| title_full | GeSe nanosheets modified surface plasmon resonance sensors for enhancing sensitivity |
| title_fullStr | GeSe nanosheets modified surface plasmon resonance sensors for enhancing sensitivity |
| title_full_unstemmed | GeSe nanosheets modified surface plasmon resonance sensors for enhancing sensitivity |
| title_short | GeSe nanosheets modified surface plasmon resonance sensors for enhancing sensitivity |
| title_sort | gese nanosheets modified surface plasmon resonance sensors for enhancing sensitivity |
| topic | germanium selenide surface plasmon resonance sensor sensitivity pb2+ heavy metal ions |
| url | http://www.degruyter.com/view/j/nanoph.2020.9.issue-2/nanoph-2019-0170/nanoph-2019-0170.xml?format=INT |
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