IN SITU, REMOTELY INTERROGATABLE MAGNETOCHEMICAL SENSORS

描述：(改编自调查人员的摘要)本提案旨在 为开发一种新型传感器提供资金，该传感器可提供 提供远程、现场、连续、长期监控的机会 化学刺激。在最初的设计中，传感器由一个东西组成 聚合层，使其在某些刺激存在时膨胀， 两边各有一层软磁性薄膜。对于固定磁体 分层设计，传感器的磁开关特性 夹层是插入聚合物的厚度的函数 间隔层。置于正弦磁场中的磁化强度 传感器的矢量周期性地反转方向，产生一系列 在适当位置的检测线圈中的电压尖峰。大体形状 电压尖峰的大小取决于间隔物的大小 对给定的刺激有反应的层有肿胀或收缩。自.以来 传感器通过磁通量的变化进行监控，无物理 需要诸如电线或电缆的连接来获得传感器信息， 也不需要激光遥测的视线；传感器可以放置 在不透明或金属外壳内，如人，密封的 袋子等。 聚合物化学是灵活的和选择性的。聚合物溶胀是 由于官能团的原因，它不涉及聚合物主链。 因此，传感器将只对给定的化学分析物做出反应 它就是被设计出来的。虽然传感器相当耐用，但 传感器的预计成本足够便宜，可以很容易地在 以一次性为基础。一个检测单元可以服务于不限数量的 传感器；这项技术将非常适合监测污染 通过体内二氧化碳水平的传感来监测血液供应或食物 葡萄糖或pH值水平，密封容器中的水分水平，金属离子 水管中的污染物等。这项研究的主要目标是 拟做的工作有：(1)精确测定电压随pH的变化 对于pH传感器以及它如何受聚合物的厚度和 磁性层和聚合物配方变量。(二)发展科技 用于控制传感器响应时间。(3)改进传感器检测 电子产品。(4)开发聚合物或其他空间层材料，用于 应用包括葡萄糖、二氧化碳、硫化氢和联氨。(3) 评估不同聚合物层的坚固性。(6)翻译 向现场示范单位开展发展工作，推广应用 新的传感器技术。

DESCRIPTION: (Adapted from the investigator's abstract) This proposal seeks funding for the development of a new type of sensor that offers the opportunity for remote, in-situ, continuous, long term monitoring of given chemical stimuli. In its initial design the sensor is comprised of a thing polymeric layer made so that it swells in the presence of certain stimuli, bounded on each side by a magnetically soft thin film. For fixed magnetic layer design, the magnetic switching characteristics of the sensor 'sandwich' are a function of the thickness of the intervening polymeric spacer layer. Placed within a sinusoidal magnetic field the magnetization vector of the sensor periodically reverses directions, generating a series of voltage spikes in suitably located detecting coils. The general shape and magnitude of the voltage spikes are dependent upon how much the spacer layer has swollen or contracted in response to the given stimuli. Since the sensor is monitored through changes in magnetic flux, no physical connections such as wires or cables are needed to obtain sensor information, nor line of sight as needed with laser telemetry; the sensors can be placed within opaque or metallic enclosures such as people, hermetically sealed bags, etc. The polymeric chemistry is flexible and selective. The polymer swelling is due only to the functional group, it does not involve the polymer backbone. Therefore, the sensor will respond only to the given chemical analyte for which it has been designed. While the sensors are quite durable, the projected cost of the sensors is inexpensive enough to be readily used on a disposable basis. One detecting unit can serve an unlimited number of sensors; the technology would be ideally suited for monitoring contamination of blood supplies or foodstuffs through sensing for CO2 levels, in-vivo glucose or pH levels, moisture levels in sealed containers, metal ion pollutants in water pipes, etc. The primary research objectives of this proposed work are: (1) Precisely determine the variation in voltage with pH for the pH sensor and how it is affected by the thickness of the polymer and magnetic layers, and polymer formulation variables. (2) Develop technology for controlling sensor response times. (3) Refine sensor detection electronics. (4) Develop polymers or other space layer materials for applications including glucose, CO2, hydrogen sulfide and hydrazine. (3) Evaluate the robustness of the different polymer layers. (6) Translate developmental work to field demonstration units to promote application of the new sensor technology.