Selective Nanowire Sensors for Chemical Agent Detection, JHAPL_FY06_022

人们迫切需要紧凑、可靠、超灵敏和具有成本效益的化学传感器来响应紧急情况和探测威胁。持久传感器的一个主要问题是尺寸和功耗要求。提出的技术解决了这个问题，提出的纳米线网络将用作选择性点传感器，利用电子和光学响应的组合。检测单个电线上吸附的化学物质将使用电流电压曲线和表面增强拉曼散射光谱。纳米线是利用表面张力和磁力生长和组装成网络的。使网络的连接点可复制并与电子传感器耦合将使多模态传感器的设计成为可能。这将使制造用于检测生物和化学制剂的低成本传感器成为可能。该组织与当地高中开展了积极的指导和实习计划，并与教师进行了接触。一个额外的大学水平的实验课程将得到加强，以处理纳米线网络的新的纳米制造要求。传感器的发展将对医学、环境监测以及国家安全产生广泛的影响。

There is a pressing requirement for compact, reliable, ultra-sensitive and cost-effective chemical sensors for emergency response and threat detection. A major problem in persistent sensors has been the size and power consumption requirements. The technology proposed answers this problem with a proposed network of nano-wires that will be used as selective point sensors, utilizing a combination of electronic and optical responses. Detection of an adsorbed chemical on individual wires will use both current voltage curves and surface-enhancde Raman scattering spectra. Nano-wires are grown and assembled into networks using surface tension and magnetic forces. Making the junctions of the networks reproducible and coupling with electronic sensors will enable design of a multi-modal sensor. This will enable low cost sensors for detection of biological and chemical agents to be built. The group has engaged with local high schools in an active mentoring and internship program, as well as outreach to teachers. An additional university-level laboratory course will be enhanced to deal with the new nano-fabrication requirements of nano-wire networks. The development of the sensors will have a broad impact in medicine and environmental monitoring, as well as national security.