Detection of Explosives by SERS Platform Using Metal Nanogap Substrates
Detecting trace amounts of explosives to ensure personal safety is important, and this is possible by using laser-based spectroscopy techniques. We performed surface-enhanced Raman scattering (SERS) using plasmonic nanogap substrates for the solution phase detection of some nitro-based compounds, ta...
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| Format: | Article |
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MDPI AG
2021-08-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/16/5567 |
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| author | Samir Adhikari Emmanuel K. Ampadu Minjun Kim Daegwon Noh Eunsoon Oh Donghan Lee |
| author_facet | Samir Adhikari Emmanuel K. Ampadu Minjun Kim Daegwon Noh Eunsoon Oh Donghan Lee |
| author_sort | Samir Adhikari |
| collection | DOAJ |
| description | Detecting trace amounts of explosives to ensure personal safety is important, and this is possible by using laser-based spectroscopy techniques. We performed surface-enhanced Raman scattering (SERS) using plasmonic nanogap substrates for the solution phase detection of some nitro-based compounds, taking advantage of the hot spot at the nanogap. An excitation wavelength of 785 nm with an incident power of as low as ≈0.1 mW was used to excite the nanogap substrates. Since both RDX and PETN cannot be dissolved in water, acetone was used as a solvent. TNT was dissolved in water as well as in hexane. The main SERS peaks of TNT, RDX, and PETN were clearly observed down to the order of picomolar concentration. The variations in SERS spectra observed from different explosives can be useful in distinguishing and identifying different nitro-based compounds. This result indicates that our nanogap substrates offer an effective approach for explosives identification. |
| first_indexed | 2024-03-10T08:23:32Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T08:23:32Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-867fa9560f8b4d87987d6a1fdfaf6f9e2023-11-22T09:42:01ZengMDPI AGSensors1424-82202021-08-012116556710.3390/s21165567Detection of Explosives by SERS Platform Using Metal Nanogap SubstratesSamir Adhikari0Emmanuel K. Ampadu1Minjun Kim2Daegwon Noh3Eunsoon Oh4Donghan Lee5Department of Physics, Chungnam National University, Daejeon 34134, KoreaDepartment of Physics, Chungnam National University, Daejeon 34134, KoreaDepartment of Physics, Chungnam National University, Daejeon 34134, KoreaDepartment of Physics, Chungnam National University, Daejeon 34134, KoreaDepartment of Physics, Chungnam National University, Daejeon 34134, KoreaDepartment of Physics, Chungnam National University, Daejeon 34134, KoreaDetecting trace amounts of explosives to ensure personal safety is important, and this is possible by using laser-based spectroscopy techniques. We performed surface-enhanced Raman scattering (SERS) using plasmonic nanogap substrates for the solution phase detection of some nitro-based compounds, taking advantage of the hot spot at the nanogap. An excitation wavelength of 785 nm with an incident power of as low as ≈0.1 mW was used to excite the nanogap substrates. Since both RDX and PETN cannot be dissolved in water, acetone was used as a solvent. TNT was dissolved in water as well as in hexane. The main SERS peaks of TNT, RDX, and PETN were clearly observed down to the order of picomolar concentration. The variations in SERS spectra observed from different explosives can be useful in distinguishing and identifying different nitro-based compounds. This result indicates that our nanogap substrates offer an effective approach for explosives identification.https://www.mdpi.com/1424-8220/21/16/5567nitro compoundsexplosives detectionSERSnanogapsurface plasmonfield enhancement |
| spellingShingle | Samir Adhikari Emmanuel K. Ampadu Minjun Kim Daegwon Noh Eunsoon Oh Donghan Lee Detection of Explosives by SERS Platform Using Metal Nanogap Substrates Sensors nitro compounds explosives detection SERS nanogap surface plasmon field enhancement |
| title | Detection of Explosives by SERS Platform Using Metal Nanogap Substrates |
| title_full | Detection of Explosives by SERS Platform Using Metal Nanogap Substrates |
| title_fullStr | Detection of Explosives by SERS Platform Using Metal Nanogap Substrates |
| title_full_unstemmed | Detection of Explosives by SERS Platform Using Metal Nanogap Substrates |
| title_short | Detection of Explosives by SERS Platform Using Metal Nanogap Substrates |
| title_sort | detection of explosives by sers platform using metal nanogap substrates |
| topic | nitro compounds explosives detection SERS nanogap surface plasmon field enhancement |
| url | https://www.mdpi.com/1424-8220/21/16/5567 |
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