EXP-SA: Ultra-Sensitive Sensory Materials for Detection of Explosives Vapor

EXP-SA：用于检测爆炸物蒸气的超灵敏传感材料

• 批准号: 0731100
• 负责人: Timothy Swager
• 金额: $ 40万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0731100&HistoricalAwards=false
• 关键词: EXP; SA; Ultra; Sensitive; Sensory

This proposal seeks to develop methods to detect a broad array of explosives in the vapor phase. Building upon his pioneering work in amplifying fluorescent polymers for explosives detection, which is presently the main explosive detection system used by US forces in Iraq, the PI will explore new concepts based upon optical and electrical transduction schemes that enable ultra-trace detection of low volatility explosives. Schemes will be developed for new point detection systems as well as remote sensors capable of standoff detection. Intellectual Merit: The ultra-trace detection of chemicals with inexpensive portable distributed sensors requires advances in the transduction/amplification of chemical events. To achieve the needed sensitivities, three different schemes are proposed. The transport of excitons to give signal gain will be extended in amplifying fluorescent polymers and demonstrated in carbon nanotubes. Electrical conduction through a carbon nanotube will also be used to create amplified sensory signals because a single analyte binding event along the tube can affect the entire system's conductance. In addition, new methods based upon molecular and polymeric sensory materials will create new fluorescence signals on dark backgrounds. The issue of chemical specificity to different explosives will be addressed by incorporating receptors, new reaction chemistry, and photooxidation/ reduction processes. Multiplexed sensory schemes will be enabled by the development of multiple methods that effectively function to uniquely recognize specific explosives. This array concept will be demonstrated in devices containing two different sensory materials that are capable of orthogonal sensory responses.Broader Impact: The research results will be incorporated into an undergraduate laboratory course. The PI will engage students in meetings with government officials who have responsibilities for developing future technologies. The PI has a strong track record of transitioning technology to real world applications and hence the proposed research will likely lead to new capabilities for use by police, fire fighters, soldiers, corporations, airports, private security, public events, and intelligence agencies.

该建议旨在开发在蒸气阶段检测一系列炸药的方法。 基于他在放大荧光聚合物进行爆炸物检测的开创性工作的基础上，这是美国军队在伊拉克使用的主要爆炸物检测系统，PI将根据光学和电气传输方案探索新概念炸药。 将开发用于新的点检测系统以及能够对抗检测的遥控传感器的方案。 智力优点：具有廉价便携式分布传感器的化学物质的超轨道检测需要在化学事件的转导/扩增方面进展。 为了达到所需的敏感性，提出了三种不同的方案。 激子的传输以给出信号增益，将扩大荧光聚合物并在碳纳米管中证明。 通过碳纳米管的电导传导也将用于创建放大的感觉信号，因为沿管的单个分析物结合事件会影响整个系统的电导。此外，基于分子和聚合感觉材料的新方法将在黑暗背景上产生新的荧光信号。 通过结合受体，新反应化学和光氧化/还原过程，将解决对不同炸药的化学特异性问题。通过开发有效识别特定爆炸物的多种方法的开发，将启用多路复用的感觉方案。该阵列概念将在包含两种能够具有正交感觉反应的两种不同感觉材料的设备中证明。Boader的影响：研究结果将纳入本科实验室课程。 PI将吸引学生与有责任发展未来技术的政府官员会议。 PI在过渡到现实世界应用方面有着很强的记录，因此拟议的研究可能会导致警察，消防员，士兵，公司，机场，私人安全，公共事件和情报机构使用的新能力。