GOALI: Gallium Nitride Nanowire-Nanocluster Hybrids for Chemical Sensing

GOALI：用于化学传感的氮化镓纳米线-纳米团簇混合物

• 批准号: 0901712
• 负责人: Mulpuri Rao
• 金额: $ 33万
• 依托单位: George Mason University
• 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: 2009-08-01 至 2014-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0901712&HistoricalAwards=false
• 关键词: GOALI; Gallium; Nitride; Nanowire; Nanocluster

The objective of the research is to develop next-generation ultra-sensitive, low-power, multi-component chemical sensors utilizing gallium nitride (GaN) nanowires. The approach is to realize highly-oriented arrays of GaN nanowires by utilizing dielectrophoresis and functionalize them with metal and metal oxide nanoclusters. After studying the electro-physical interactions of chemical species with these functionalized nanowires, ultra-sensitive, low-power sensors capable of operating in extreme conditions will be realized. Commercial thin film sensors have significant limitations in terms of sensitivity, selectivity, and reliability. The proposed ?hybrid? devices will provide numerous active sites for adsorption of molecules and subsequent catalysis of chemical reactions. By combining the enhanced catalytic properties of the nanoclusters with the sensitive transduction capabilities of the nanowires, an ultra-sensitive and highly selective chemical sensing architecture will be created. Post-growth assembly and functionalization will enable the development of sensor arrays in a single chip for multi-component sensing.Successful completion of this project will advance our understanding of the fundamental interactions of various chemical species with nanoscale surfaces, which is essential for the development of ultra-sensitive sensors. Nitride based highly selective gas/chemical nanosensors could have multitude of applications including environmental monitoring, biological detection for clinical purposes, and for detection of chemical and biological threats. Results of this research will be incorporated into a graduate level course on nano-electronics. Students from underrepresented groups and undergraduate students will be recruited to work on this project. A science teacher and students of a local Science and Technology magnet high school will be involved in the proposed research.

该研究的目标是利用氮化镓（GaN）纳米线开发下一代超灵敏，低功耗，多组分化学传感器。该方法是通过利用介电电泳实现GaN纳米线的高度取向阵列，并将其与金属和金属氧化物纳米团簇功能化。在研究了化学物质与这些功能化纳米线的电物理相互作用后，将实现能够在极端条件下工作的超灵敏、低功耗传感器。商业薄膜传感器在灵敏度、选择性和可靠性方面具有显著的限制。求婚的人？混血儿？装置将提供许多活性位点用于吸附分子和随后催化化学反应。通过将纳米团簇的增强的催化性能与纳米线的灵敏的转导能力相结合，将创建超灵敏和高选择性的化学传感架构。生长后组装和功能化将使传感器阵列的开发在一个单一的芯片，多组分传感。该项目的成功完成将推进我们的理解的各种化学物种与纳米尺度表面的基本相互作用，这是至关重要的超灵敏传感器的发展。基于氮化物的高选择性气体/化学纳米传感器可以具有多种应用，包括环境监测、用于临床目的的生物检测以及用于检测化学和生物威胁。这项研究的结果将被纳入研究生水平的纳米电子学课程。来自代表性不足的群体和本科生的学生将被招募到这个项目的工作。当地一所科技磁铁高中的科学教师和学生将参与这项拟议中的研究。