NMR on a Chip - A Micro-NMR Device for In Situ Detection of Chlorides in Concrete

提案编号9980759PI Dr. James H. Garrett职务：芯片上的NMR：一种用于混凝土中氯离子原位检测的微型核磁共振装置这个工程微系统：“XYZ”芯片项目的目标是研究一种基于微型核磁共振（NMR）的检测器的假设，该检测器被定义为除了磁体和电源之外的NMR的所有方面，可以检测混凝土中的氯离子。 核磁共振仪的线圈、振荡器和基本电子设备（通常是大型昂贵的设备）正在用CMOS工艺在单个芯片上制造。 线圈匝的厚度为1微米，直径为1至2毫米。 该团队包括来自土木工程，化学工程，电气工程和物理学的教师。 该项目的第一阶段是微型NMR的建模和理论分析。 第二阶段包括旨在证明微型NMR可以检测质子的实验。 这是一个有用的中间目标，因为质子的响应比氯化物大100倍，并且该信号可用于校准氯化物检测。第三阶段是测量混凝土中游离氯离子的浓度。 这项工作的结果支撑了一种传感器技术，可能对国家的民用基础设施产生重大影响。 例如，基于NMR并分散在整个桥面上的经济型氯化物传感器可以触发修复，防止由于钢筋腐蚀而导致的结构损失。 该项目更广泛的影响是创造了一种可以找到生物医学和其他应用的技术。

Proposal # 9980759PI Dr. James H. GarrettTitle: NMR on a Chip: a Micro-NMR Device for in situ Detection ofChloride in ConcreteThe goal of this Engineering Microsystems: "XYZ" on a Chip project is to investigate the hypothesis that a micro nuclear magnetic resonance (NMR) based detector, defined as all aspects of an NMR other than the magnet and power supply, can detect chloride ion in concrete. The coils, oscillator, and essential electronics of an NMR, typically a large expensive device, are being created on a single chip with the CMOS process. The coil turns are one micron thick and one to two millimeters in diameter. The team includes faculty from civil engineering, chemical engineering, electrical engineering, and physics. The project's first stage is modeling and theoretical analysis of a micro NMR. The second stage consists of experiments aimed at demonstrating that the micro NMR can detect protons. This is a useful intermediate objective because the response of protons is 100 times larger than chloride and the signal can be used for calibration of the chloride detection. The third stage is measuring the concentration of free chloride in concrete. The results of this work underpin a sensor technology that could have a substantial impact on the nation's civil infrastructure. For example, an economical chloride sensor based on NMR and dispersed throughout a bridge deck can trigger remediation that prevents loss of the structure due to corrosion of the steel reinforcement. The broader impact of the project is creation of a technology that could find biomedical and other applications.