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Detection of Buried Explosives Using a Surface-Enhanced Raman Scattering (SERS) Substrate Tailored for Miniaturized Spectrometers.
ACS Sensors ( IF 8.2 ) Pub Date : 2020-08-17 , DOI: 10.1021/acssensors.0c01412 Yuting Huang 1 , Wen Liu 1 , Zhengjun Gong 1 , Wei Wu 1 , Meikun Fan 1 , Dongmei Wang 1 , Alexandre G Brolo 2
ACS Sensors ( IF 8.2 ) Pub Date : 2020-08-17 , DOI: 10.1021/acssensors.0c01412 Yuting Huang 1 , Wen Liu 1 , Zhengjun Gong 1 , Wei Wu 1 , Meikun Fan 1 , Dongmei Wang 1 , Alexandre G Brolo 2
Affiliation
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The advent of miniaturized, fiber-based, Raman spectrometers provides a clear path for the wide implementation of surface-enhanced Raman scattering (SERS) in analytical chemistry. For instance, miniaturized systems are especially useful in field applications due to their simplicity and low cost. However, traditional SERS substrates are generally developed and optimized using expensive Raman microscope systems equipped with high numerical aperture (NA) objective lenses. Here, we introduced a new type of SERS substrate with intrinsic Raman photon directing capability that compensates the relatively low signal collection power of fiber-based Raman spectrometers. The substrate was tested for the detection of buried 2,4-dinitrotoluene in simulated field conditions. A linear calibration curve (R2 = 0.98) for 2,4-dinitrotoluene spanning 3 orders of magnitude (from μg kg–1 to mg kg–1) was obtained with a limit of detection of 10 μg kg–1 within a total volume of 10 μL. This detection level is 2 orders of magnitude lower than that possible with the current state-of-the-art technologies, such as ion mobility spectrometry–mass spectrometry. The approach reported here demonstrated a high-performance detection of 2,4-dinitrotoluene in field conditions by a SERS platform optimized for miniaturized Raman systems that can be deployed for a routine inspection of landmine-contaminated sites and homeland security applications.
中文翻译：
使用专为小型光谱仪量身定制的表面增强拉曼散射（SERS）基板检测埋藏炸药。
小型的基于纤维的拉曼光谱仪的出现为在分析化学中广泛实施表面增强拉曼散射（SERS）提供了一条清晰的途径。例如，小型化系统由于其简单性和低成本而在现场应用中特别有用。但是，通常使用配备有高数值孔径（NA）物镜的昂贵的拉曼显微镜系统开发和优化传统的SERS基板。在这里，我们介绍了一种具有固有拉曼光子定向能力的新型SERS基底，该基底能够补偿基于光纤的拉曼光谱仪相对较低的信号收集能力。测试该基材以在模拟的现场条件下检测掩埋的2,4-二硝基甲苯。线性校准曲线（R 2= 0.98）的2,4-二硝基甲苯的跨度为3个数量级（从μgkg –1到mg kg –1），总体积为10μL ，检出限为10μgkg –1。该检测水平比离子迁移谱-质谱等当前最新技术的检测水平低2个数量级。本文报道的方法证明，通过针对小型拉曼系统优化的SERS平台，可以在野外条件下对2,4-二硝基甲苯进行高性能检测，该系统可用于常规检查受地雷污染的场所和国土安全应用。
更新日期：2020-09-25
中文翻译：
使用专为小型光谱仪量身定制的表面增强拉曼散射（SERS）基板检测埋藏炸药。
小型的基于纤维的拉曼光谱仪的出现为在分析化学中广泛实施表面增强拉曼散射（SERS）提供了一条清晰的途径。例如，小型化系统由于其简单性和低成本而在现场应用中特别有用。但是，通常使用配备有高数值孔径（NA）物镜的昂贵的拉曼显微镜系统开发和优化传统的SERS基板。在这里，我们介绍了一种具有固有拉曼光子定向能力的新型SERS基底，该基底能够补偿基于光纤的拉曼光谱仪相对较低的信号收集能力。测试该基材以在模拟的现场条件下检测掩埋的2,4-二硝基甲苯。线性校准曲线（R 2= 0.98）的2,4-二硝基甲苯的跨度为3个数量级（从μgkg –1到mg kg –1），总体积为10μL ，检出限为10μgkg –1。该检测水平比离子迁移谱-质谱等当前最新技术的检测水平低2个数量级。本文报道的方法证明，通过针对小型拉曼系统优化的SERS平台，可以在野外条件下对2,4-二硝基甲苯进行高性能检测，该系统可用于常规检查受地雷污染的场所和国土安全应用。
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