Collaborative Research: Engineering Miniaturized Gas Sensors with Hybrid Nanostructures

合作研究：利用混合纳米结构设计微型气体传感器

• 批准号: 0856719
• 负责人: Steven Lewis
• 金额: $ 10万
• 依托单位: University of Georgia Research Foundation Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-15 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0856719&HistoricalAwards=false
• 关键词: Collaborative; Research; Engineering; Miniaturized; Gas

This pair of collaborative projects will be awarded using funds made available by the American Recovery and Reinvestment Act of 2009 (Public Law 111-5), and meets the requirements established in Section 2 of the White House Memorandum entitled, Ensuring Responsible Spending of Recovery Act Funds, dated March 20, 2009. I also affirm, as the cognizant Program Officer, that the proposal does not support projects described in Section 1604 of Division A of the Recovery Act. The objective of this collaborative project is to investigate a novel sensing platform of a carbon nanotube (CNT) coated with discrete SnO2 nanocrystals for miniaturized gas sensors. The project will combine experiments (atomic, electronic, electrical, and spectroscopic characterizations) with theoretical modeling to establish the composition-structure-processing-sensing relationship for revealing the novel sensing mechanism. Through the marriage between high-performance CNTs and the popular sensing material SnO2, the proposed hybrid SnO2 nanocrystal-CNT platform allows for the room-temperature sensing of various gases at high sensitivity, which is otherwise unattainable with either SnO2 sensors (high-temperature operation required) or CNT sensors (only sensitive to selected gases). The project research results are expected to lead to miniaturized gas sensors that can rapidly and accurately detect and differentiate trace amounts of chemical species for various applications. The detailed experimental investigation of the atomic structure, electronic properties, electrical characteristics, surface chemistry, and surface dynamics of nanosensors, together with first-principles models, will not only illuminate the underlying mechanisms of the novel sensing platform but also contribute to the fundamental understanding of transport phenomena in low-dimensional materials and hybrid systems. The project will create a unique interdisciplinary learning and research environment to train students in materials science, surface science, and nanodevice engineering. The project also will attract underrepresented groups through engagement with Historically Black Colleges and Universities (HBCUs).

这两个合作项目将使用2009年《美国复苏和再投资法案》(公法111-5)提供的资金授予，并符合2009年3月20日题为《确保负责任地使用复苏法案资金》的白宫备忘录第2节规定的要求。作为认知项目官员，我还确认，该提案不支持《复苏法案》A分部第1604节所述的项目。该合作项目的目标是研究一种新型的碳纳米管(CNT)传感平台，该碳纳米管(CNT)包覆离散的SnO2纳米晶，用于微型化气体传感器。该项目将把实验(原子、电子、电学和光谱表征)与理论建模相结合，建立成分-结构-加工-传感关系，以揭示新的传感机制。通过将高性能碳纳米管与流行的传感材料SnO2相结合，拟议的SnO2纳米晶体-CNT混合平台允许以高灵敏度对各种气体进行室温传感，这是SnO2传感器(需要高温操作)或CNT传感器(仅对选定气体敏感)无法实现的。该项目的研究成果有望导致微型气体传感器的出现，这种传感器可以快速准确地检测和区分各种应用中的痕量化学物质。对纳米传感器的原子结构、电子性质、电学特性、表面化学和表面动力学的详细实验研究，以及第一性原理模型，不仅将阐明新型传感平台的潜在机制，而且有助于从根本上理解低维材料和混杂系统中的输运现象。该项目将创造一个独特的跨学科学习和研究环境，以培养材料科学、表面科学和纳米设备工程方面的学生。该项目还将通过与历史上的黑人学院和大学(HBCU)接触来吸引代表性不足的群体。