Sensors and Sensor Networks: Design, Synthesis and Performance Evaluation of Nanocomposite Semiconductor Gas Sensors

传感器和传感器网络：纳米复合半导体气体传感器的设计、合成和性能评估

• 批准号: 0329631
• 负责人: Margaret Wooldridge
• 金额: $ 27.26万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-01 至 2007-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0329631&HistoricalAwards=false
• 关键词: Sensors; Sensor; Networks; Design; Synthesis

The primary objective of the proposed research program is to successfully demonstrate dramatically improved performance of nanocomposite SnO2 sensors made using a novel synthesis approach. Staged nucleation of nanoparticles will be used to make high-value-added SnO2 sensor materials doped with noble metal additives using a multi-element diffusion burner. In particular, gold nano-islands are expected to yield remarkable increases in sensor sensitivity due to the extremely high catalytic activity of Au demonstrated in previous studies. Therefore, the Au/SnO2 system will be the primary focus of the research effort. The effects of particle size, Au loading and relative particle morphologies on sensor performance will be quantitatively determined. High-resolution microscope imaging (e.g. scanning and transmission electron microscopy coupled with elemental analysis methods) will be used to characterize the materials properties. Performance of the powders in gas sensor applications will be quantified in terms of sensor time response, sensitivity, selectivity and stability. Outcomes of the research include the potential to create mechanically simple, rapid time response, sensitive, selective, stable, toxic-gas sensors that can be operated over a large temperature range. NOx sensors with these properties are a specific focus of the research program due to applications in internal combustion engine systems. The broader impacts therefore include more precise design of automotive exhaust gas catalysts and corresponding materials and costs savings.

拟议的研究计划的主要目的是成功地证明使用新型合成方法制造的纳米复合材料SNO2传感器的性能很大。 纳米颗粒的分期成核将用于制造使用多元素扩散燃烧器掺有贵金属添加剂的高价值SNO2传感器材料。 特别是，由于先前研究中AU的极高催化活性，预期金纳米岛有望使传感器敏感性显着提高。 因此，AU/SNO2系统将是研究工作的主要重点。 粒度，AU载荷和相对粒子形态对传感器性能的影响将被定量确定。 高分辨率显微镜成像（例如，扫描和透射电子显微镜与元素分析方法）将用于表征材料特性。 气体传感器应用中粉末的性能将根据传感器时间响应，灵敏度，选择性和稳定性进行量化。 这项研究的结果包括创建机械简单，快速的时间响应的潜力，灵敏，选择性，稳定，有毒的气体传感器，可以在较大的温度范围内进行操作。 由于内燃机系统中的应用，具有这些属性的NOX传感器是研究计划的特定重点。 因此，更广泛的影响包括更精确的汽车排气催化剂以及相应的材料和成本节省的设计。