Remote Raman Detection of Trace Explosives by Laser Beam Focusing and Plasmonic Spray Enhancement Methods
| Autor: | Rui Hao, Jiawei Zhao, Jiakai Liu, Hongjun You, Jixiang Fang |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Analytical Chemistry. 94:11230-11237 |
| ISSN: | 1520-6882 0003-2700 |
| DOI: | 10.1021/acs.analchem.2c01732 |
| Popis: | Remote Raman spectroscopy is a technique that can detect and identify different target molecules through Raman vibrational modes from a remote distance. However, the current remote Raman technique is restricted by poor detection sensitivity, and it is still extremely challenging for trace explosive detection. Here, in order to achieve trace explosive detection from a remote distance, we innovatively propose two enhanced Raman spectroscopy methods by using a plasmonic spray and a laser beam focusing/Raman signal collecting instrument. In brief, a facile convex lens can converge the laser beam and collect Raman scattering signals, and a plasmonic spray can be used for surface-enhanced Raman scattering. Under the combination of the above enhancement methods, we achieve remote Raman detection of a variety of trace explosives with a concentration of ∼1 μg/cm |
| Databáze: | OpenAIRE |
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