Sensors: Engineered Nanowires and Arrays as Advanced Chemical Nanosensors

传感器：作为先进化学纳米传感器的工程纳米线和阵列

• 批准号: 0426450
• 负责人: Nitin Padture
• 金额: --
• 依托单位: University of Connecticut
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-10-01 至 2005-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0426450&HistoricalAwards=false
• 关键词: Sensors; Engineered; Nanowires; Arrays; Advanced

Research:The objective of this project is to elucidate the concept of self-assembled arrays of engineered nanowires, where each nanowire can be addressed individually as a chemicalnanosensor. To that end, the PI will synthesize engineered metal-oxide-metal (MOM)nanowires, comprising of a noble-metal nanowires with a small segment being replaced by ananocrystalline sensor oxide: SnO2. In other words, a MOM nanowire has a nanoscale SnO2cylinder of precise dimensions with integral noble-metal nanowire interconnects. The MOMnanowires sensors are expected to have unprecedented sensitivity and selectivity due to:(i) nanoscale SnO2 segment, (ii) nanocrystalline grains within the SnO2, (iii) noble-metalnanowire interconnect serving as an integral catalyst, and (iv) low temperature-sensitivity and low Ohmic losses. Moreover, MOM nanowires offer the rare opportunity of measuring directly the electrical conductivity of a nanoscale sensor material.Broader Impact:This project will result in the training of a number of graduate and undergraduate students in the area of nanosensor research, while exposing them to an international collaboration with the National Chemical Laboratory, Pune, India. In addition, the PI will perform K-12 outreach to get high school students excited about careers in engineering.

研究：该项目的目标是阐明工程纳米线自组装阵列的概念，其中每条纳米线都可以单独处理为化学纳米传感器。为此，PI将合成工程金属-氧化物-金属（MOM）纳米线，由贵金属纳米线组成，其中一小段由一种纳米晶传感器氧化物：SnO2取代。换句话说，MOM纳米线具有精确尺寸的纳米级sno2圆柱体，并具有完整的贵金属纳米线互连。由于：(i)纳米级SnO2片段，（ii） SnO2内部的纳米晶颗粒，（iii）贵金属-金属纳米线互连作为整体催化剂，以及（iv）低温敏感性和低欧姆损耗，momo纳米线传感器有望具有前所未有的灵敏度和选择性。此外，MOM纳米线提供了直接测量纳米级传感器材料电导率的难得机会。更广泛的影响：该项目将培养一些纳米传感器研究领域的研究生和本科生，同时使他们接触到与印度浦那国家化学实验室的国际合作。此外，PI还将开展K-12外展活动，让高中生对工程职业感到兴奋。