High-sensitivity detection of TNT
Top Cited Papers
- 26 December 2006
- journal article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 103 (52) , 19630-19634
- https://doi.org/10.1073/pnas.0609789104
Abstract
We report high-sensitivity detection of 2,4,6-trinitrotoluene (TNT) by using laser photoacoustic spectroscopy where the laser radiation is obtained from a continuous-wave room temperature high-power quantum cascade laser in an external grating cavity geometry. The external grating cavity quantum cascade laser is continuously tunable over ≈400 nm around 7.3 μm and produces a maximum continuous-wave power of ≈200 mW. The IR spectroscopic signature of TNT is sufficiently different from that of nitroglycerine so that unambiguous detection of TNT without false positives from traces of nitroglycerine is possible. We also report the results of spectroscopy of acetylene in the 7.3-μm region to demonstrate continuous tunability of the IR source.Keywords
This publication has 11 references indexed in Scilit:
- Sub-parts-per-billion level detection of NO2using room-temperature quantum cascade lasersProceedings of the National Academy of Sciences, 2006
- External cavity quantum-cascade laser tunable from 8.2to10.4μm using a gain element with a heterogeneous cascadeApplied Physics Letters, 2006
- Improved performance of quantum cascade lasers through a scalable, manufacturable epitaxial-side-down mounting processProceedings of the National Academy of Sciences, 2006
- High-sensitivity, high-selectivity detection of chemical warfare agentsApplied Physics Letters, 2006
- Optical detection of chemical warfare agents and toxic industrial chemicals: SimulationJournal of Applied Physics, 2005
- Determination of the Vapor Density of Triacetone Triperoxide (TATP) Using a Gas Chromatography Headspace TechniquePropellants, Explosives, Pyrotechnics, 2005
- Ultra-sensitive ambient ammonia detection using CO2-laser-based photoacoustic spectroscopyApplied Physics B Laser and Optics, 2003
- The HITRAN molecular spectroscopic database: edition of 2000 including updates through 2001Journal of Quantitative Spectroscopy and Radiative Transfer, 2003
- Application of mid-infrared cavity-ringdown spectroscopy to trace explosives vapor detection using a broadly tunable (6-8 μm) optical parametric oscillatorApplied Physics B Laser and Optics, 2002
- Laser optoacoustic absorption spectra for various explosive vaporsApplied Optics, 1978