Surface-enhanced Raman detection of 1,4-dinitrotoluene impurity vapor as a marker to locate landmines
Surface-enhanced Raman detection of 1,4-dinitrotoluene impurity vapor as a marker to locate landmines
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DOI：
10.1021/ac0006573
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发表时间：
2000-12-01
影响因子：
7.4
通讯作者：
Spencer, KM
中科院分区：
文献类型：
--
作者：
Sylvia, JM;Janni, JA;Spencer, KM
与排雷工作有关的时间、费用和伤亡突出表明需要改进探测技术。希望通过直接检测爆炸物材料而不是外壳材料来减少误报的数量。所需的场传感器必须至少具有再现性、必要的灵敏度、便携性、仪器稳定性和快速的系统响应时间。理想情况下，振动光谱技术有可能消除假阳性，因为每种化学物质都有独特的键结构。在这里，我们证明了表面增强拉曼光谱检测的化学蒸汽签名从埋TNT为基础的地雷发出的能力。我们提出了可重复的结果，从盲测试控制的美国国防高级研究计划局（DARPA），证明蒸气检测2，4-二硝基甲苯的浓度水平为5 ppb或less. The结果提出了使用30 s的采集时间上的fieldable系统，并表明Sers可以是一个显着的改进，目前的地雷检测方法。
Time, cost, and casualties associated with demining efforts underscore the need for improved detection techniques. Reduction in the number of false positives by directly detecting the explosive material, rather than casing material, is desirable. The desired field sensor must, at a minimum, demonstrate reproducibility, the necessary level of sensitivity, portability, instrumental stability, and fast system response times. Ideally, vibrational spectroscopic techniques have the potential to remove false positives, since every chemical has a unique bond structure. Herein, we demonstrate the capabilities of surface-enhanced Raman spectroscopy to detect the chemical vapor signature emanating from buried TNT-based landmines. We present reproducible results obtained from blind tests controlled by the Defense Advanced Research Projects Agency (DARPA) that demonstrate vapor detection of 2,4-dinitrotoluene at concentration levels of 5 ppb or less. The results presented used acquisition times of 30 s on a fieldable system and showed that SERS can be a significant improvement over current landmine detection methods.