Optimization of ultraviolet Raman spectroscopy for trace explosive checkpoint screening
Abstract Raman spectroscopy has long been considered a gold standard for optically based chemical identification, but has not been adopted in non-laboratory operational settings due to limited sensitivity and slow acquisition times. Ultraviolet (UV) Raman spectroscopy has the potential to address t...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Springer Berlin Heidelberg
2021
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| Online Access: | https://hdl.handle.net/1721.1/131840 |
| _version_ | 1826194507644796928 |
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| author | Amin, Mitesh Wen, Patrick Herzog, William D Kunz, Roderick R |
| author2 | Lincoln Laboratory |
| author_facet | Lincoln Laboratory Amin, Mitesh Wen, Patrick Herzog, William D Kunz, Roderick R |
| author_sort | Amin, Mitesh |
| collection | MIT |
| description | Abstract
Raman spectroscopy has long been considered a gold standard for optically based chemical identification, but has not been adopted in non-laboratory operational settings due to limited sensitivity and slow acquisition times. Ultraviolet (UV) Raman spectroscopy has the potential to address these challenges through the reduction of fluorescence from background materials and increased Raman scattering due to the shorter wavelength (relative to visible or near-infrared excitation) and resonant enhancement effects. However, the benefits of UV Raman must be evaluated against specific operational situations: the actual realized fluorescence reduction and Raman enhancement depend on the specific target materials, target morphology, and operational constraints. In this paper, the wavelength trade-space in UV Raman spectroscopy is evaluated for one specific application: checkpoint screening for trace explosive residues. The optimal UV wavelength is evaluated at 244, 266, and 355 nm for realistic trace explosive and explosive-related compound (ERC) residues on common checkpoint materials: we perform semi-empirical analysis that includes the UV penetration depth of common explosive and ERCs, realistic explosive and ERC residue particle sizes, and the fluorescence signal of common checkpoint materials. We find that while generally lower UV wavelength provides superior performance, the benefits may be significantly reduced depending on the specific explosive and substrate. Further, logistical requirements (size, weight, power, and cost) likely limit the adoption of optimal wavelengths.
Graphical abstract |
| first_indexed | 2024-09-23T09:57:11Z |
| format | Article |
| id | mit-1721.1/131840 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T09:57:11Z |
| publishDate | 2021 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1318402023-02-23T15:05:47Z Optimization of ultraviolet Raman spectroscopy for trace explosive checkpoint screening Amin, Mitesh Wen, Patrick Herzog, William D Kunz, Roderick R Lincoln Laboratory Abstract Raman spectroscopy has long been considered a gold standard for optically based chemical identification, but has not been adopted in non-laboratory operational settings due to limited sensitivity and slow acquisition times. Ultraviolet (UV) Raman spectroscopy has the potential to address these challenges through the reduction of fluorescence from background materials and increased Raman scattering due to the shorter wavelength (relative to visible or near-infrared excitation) and resonant enhancement effects. However, the benefits of UV Raman must be evaluated against specific operational situations: the actual realized fluorescence reduction and Raman enhancement depend on the specific target materials, target morphology, and operational constraints. In this paper, the wavelength trade-space in UV Raman spectroscopy is evaluated for one specific application: checkpoint screening for trace explosive residues. The optimal UV wavelength is evaluated at 244, 266, and 355 nm for realistic trace explosive and explosive-related compound (ERC) residues on common checkpoint materials: we perform semi-empirical analysis that includes the UV penetration depth of common explosive and ERCs, realistic explosive and ERC residue particle sizes, and the fluorescence signal of common checkpoint materials. We find that while generally lower UV wavelength provides superior performance, the benefits may be significantly reduced depending on the specific explosive and substrate. Further, logistical requirements (size, weight, power, and cost) likely limit the adoption of optimal wavelengths. Graphical abstract 2021-09-20T17:30:32Z 2021-09-20T17:30:32Z 2020-05-29 2020-09-24T20:47:40Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/131840 en https://doi.org/10.1007/s00216-020-02725-2 Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. Springer-Verlag GmbH Germany, part of Springer Nature application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Amin, Mitesh Wen, Patrick Herzog, William D Kunz, Roderick R Optimization of ultraviolet Raman spectroscopy for trace explosive checkpoint screening |
| title | Optimization of ultraviolet Raman spectroscopy for trace explosive checkpoint screening |
| title_full | Optimization of ultraviolet Raman spectroscopy for trace explosive checkpoint screening |
| title_fullStr | Optimization of ultraviolet Raman spectroscopy for trace explosive checkpoint screening |
| title_full_unstemmed | Optimization of ultraviolet Raman spectroscopy for trace explosive checkpoint screening |
| title_short | Optimization of ultraviolet Raman spectroscopy for trace explosive checkpoint screening |
| title_sort | optimization of ultraviolet raman spectroscopy for trace explosive checkpoint screening |
| url | https://hdl.handle.net/1721.1/131840 |
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