Honeycomb-like aluminum antennas for surface-enhanced infrared absorption sensing
Surface-enhanced infrared absorption (SEIRA) spectroscopy is a competent method to detect trace quantity of molecules and even protein conformational flexibility by enhancing their vibrational modes. To improve the spectroscopy features, we propose a surface with honeycomb-like (HC) arrangement of a...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2023-04-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2023-0131 |
| _version_ | 1797800861589569536 |
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| author | Najem Melissa Carcenac Franck Coutaud Luka Mouhibi Mohamed Taliercio Thierry Gonzalez-Posada Fernando |
| author_facet | Najem Melissa Carcenac Franck Coutaud Luka Mouhibi Mohamed Taliercio Thierry Gonzalez-Posada Fernando |
| author_sort | Najem Melissa |
| collection | DOAJ |
| description | Surface-enhanced infrared absorption (SEIRA) spectroscopy is a competent method to detect trace quantity of molecules and even protein conformational flexibility by enhancing their vibrational modes. To improve the spectroscopy features, we propose a surface with honeycomb-like (HC) arrangement of aluminum equilateral triangles within a metal-insulator-metal configuration. With adjustable geometric parameters, the HC nanoantennas allow a tunable and wide spectral coverage in the IR. The reflectance measurements correlate extremely well with the numerical simulations. Being compact and insensitive to the light polarization, the HC are appealing for boosting the signal-to-noise ratio and increasing the number of hotspots as required for sensing applications. These nanoantennas are thus suitable for accurate and broadband SEIRA sensing via a spectral overlap between the large plasmonic resonances and the narrow IR vibrational modes of our analyte (vanillin). In line with our previously studied bowties nanoantennas, we demonstrate, using HC, SEIRA enhancement factors greater than 107 achieved at a tuning ratio below 1 stating the best spectral overlap. Around 104 molecules are sensed per HC tip. The investigation results are matching the best-reported SEIRA studies. These findings pave the way toward sensitive, adaptable, and miniaturized IR spectroscopy devices for vital applications like biosensing and environmental monitoring. |
| first_indexed | 2024-03-13T04:41:42Z |
| format | Article |
| id | doaj.art-afe361693ec0440eaaf1b7c62ded5044 |
| institution | Directory Open Access Journal |
| issn | 2192-8614 |
| language | English |
| last_indexed | 2024-03-13T04:41:42Z |
| publishDate | 2023-04-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj.art-afe361693ec0440eaaf1b7c62ded50442023-06-19T05:53:25ZengDe GruyterNanophotonics2192-86142023-04-0112122199221210.1515/nanoph-2023-0131Honeycomb-like aluminum antennas for surface-enhanced infrared absorption sensingNajem Melissa0Carcenac Franck1Coutaud Luka2Mouhibi Mohamed3Taliercio Thierry4Gonzalez-Posada Fernando5University of Montpellier, Institut d’Electronique et des Systèmes, Montpellier, Occitanie, FranceCNRS Laboratory for Systems Analysis and Architecture, Toulouse, Occitanie, FranceUniversity of Montpellier, Institut d’Electronique et des Systèmes, Montpellier, Occitanie, FranceUniversity of Montpellier, Institut d’Electronique et des Systèmes, Montpellier, Occitanie, FranceUniversity of Montpellier, Institut d’Electronique et des Systèmes, Montpellier, Occitanie, FranceUniversity of Montpellier, Institut d’Electronique et des Systèmes, Montpellier, Occitanie, FranceSurface-enhanced infrared absorption (SEIRA) spectroscopy is a competent method to detect trace quantity of molecules and even protein conformational flexibility by enhancing their vibrational modes. To improve the spectroscopy features, we propose a surface with honeycomb-like (HC) arrangement of aluminum equilateral triangles within a metal-insulator-metal configuration. With adjustable geometric parameters, the HC nanoantennas allow a tunable and wide spectral coverage in the IR. The reflectance measurements correlate extremely well with the numerical simulations. Being compact and insensitive to the light polarization, the HC are appealing for boosting the signal-to-noise ratio and increasing the number of hotspots as required for sensing applications. These nanoantennas are thus suitable for accurate and broadband SEIRA sensing via a spectral overlap between the large plasmonic resonances and the narrow IR vibrational modes of our analyte (vanillin). In line with our previously studied bowties nanoantennas, we demonstrate, using HC, SEIRA enhancement factors greater than 107 achieved at a tuning ratio below 1 stating the best spectral overlap. Around 104 molecules are sensed per HC tip. The investigation results are matching the best-reported SEIRA studies. These findings pave the way toward sensitive, adaptable, and miniaturized IR spectroscopy devices for vital applications like biosensing and environmental monitoring.https://doi.org/10.1515/nanoph-2023-0131aluminumhoneycomb nanoantennasmimplasmonicsseira spectroscopywide tunability |
| spellingShingle | Najem Melissa Carcenac Franck Coutaud Luka Mouhibi Mohamed Taliercio Thierry Gonzalez-Posada Fernando Honeycomb-like aluminum antennas for surface-enhanced infrared absorption sensing Nanophotonics aluminum honeycomb nanoantennas mim plasmonics seira spectroscopy wide tunability |
| title | Honeycomb-like aluminum antennas for surface-enhanced infrared absorption sensing |
| title_full | Honeycomb-like aluminum antennas for surface-enhanced infrared absorption sensing |
| title_fullStr | Honeycomb-like aluminum antennas for surface-enhanced infrared absorption sensing |
| title_full_unstemmed | Honeycomb-like aluminum antennas for surface-enhanced infrared absorption sensing |
| title_short | Honeycomb-like aluminum antennas for surface-enhanced infrared absorption sensing |
| title_sort | honeycomb like aluminum antennas for surface enhanced infrared absorption sensing |
| topic | aluminum honeycomb nanoantennas mim plasmonics seira spectroscopy wide tunability |
| url | https://doi.org/10.1515/nanoph-2023-0131 |
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