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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Assessing the potential of metal oxide semiconducting gas sensors for illicit drug detection markers
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Assessing the potential of metal oxide semiconducting gas sensors for illicit drug detection markers

机译:评估金属氧化物半导体气体传感器作为非法药物检测标记的潜力

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摘要

Port security with a focus on drug trafficking prevention requires inexpensive and portable systems for on-site analysis of containers in order to minimise transit delays. The potential of metal oxide semiconductors for illicit drug detection is explored here. A six-sensor array consisting of WO3 and SnO2 inks was devised. Zeolites H-Y and H-ZSM-5 were incorporated to introduce variations in sensor response. Sensors were tested against acetone, ethanol and toluene as proxies for their use in illicit drug manufacture and against ammonia and nitrogen dioxide as first models of amino-and nitro-containing compounds, given their prevalence in the structural framework of drugs and precursor molecules. Sensor sensitivity and selectivity were greatly enhanced by inclusion of zeolite materials. Admixed sensing materials were found to be particularly sensitive to the gases. Support vector machines were applied to the dataset as classification tools that accurately classified the data according to gas type. The sensing array was successful in targeting and discerning between the tested drug markers. This could be key for illicit drug detection with electronic noses based on MOS technology in the future.
机译:专注于预防毒品贩运的港口安全需要廉价,便携式的系统来对集装箱进行现场分析,以最大程度地减少运输延误。本文探讨了金属氧化物半导体在非法药物检测中的潜力。设计了由WO3和SnO2墨水组成的六传感器阵列。掺入了沸石H-Y和H-ZSM-5,以引入传感器响应的变化。鉴于传感器,丙酮和乙醇在甲苯和前体分子的结构框架中的普遍性,对传感器进行了针对丙酮,乙醇和甲苯作为非法药物生产代理的测试,并针对氨和二氧化氮作为含氨基和硝基化合物的第一模型进行了测试。通过包含沸石材料,大大提高了传感器的灵敏度和选择性。发现混合的传感材料对气体特别敏感。支持向量机作为分类工具应用于数据集,可根据气体类型对数据进行准确分类。传感阵列成功地靶向并识别了所测试的药物标记物。这可能是将来基于MOS技术的电子鼻非法药物检测的关键。

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