CRC: Micro Imaging for Sensory and Materials Applications

麻省理工学院的Daniel G.Nocera和Mungi G.Bawendi和密歇根州立大学的Manochehr M.Koochesfahani共同得到了化学部门、化学运输系统部门和数学和物理科学局多学科活动办公室的支持，以促进他们在新的基于分子的光学诊断技术方面的跨学科合作，以测量小空间尺度上的流动。他们将使用新合成的基于笼式激光染料分子和纳米晶体量子点的荧光示踪剂来成像速度低于1 mm/S的流动。新的光学技术将被开发用于定量测量多变量流动特性(如流动速度场、温度、浓度)和小维度的输运。诊断将询问微通道中流动的重要基本原理，包括传输到表面50-150 nm范围内。了解微通道中的流动行为是发展小空间尺度上的主动流动和混合控制的关键一步。从这些流动研究中定义的这些原理将被合并到包含分布式反馈(DFB)激光器作为光学传感器元件的微通道中。流量控制和与DFB体系结构的混合的集成可能会在极小的长度尺度上产生前所未有的分析灵敏度。这些原理是许多新兴微器件技术的基础，特别是微型传感器和微型反应堆。化学合作研究奖(CRC)颁发给致力于广泛化学兴趣问题的科学家的跨学科团队。这些奖项的重点是研究和培训的新合作模式。

Daniel G. Nocera and Moungi G. Bawendi of MIT and Manoochehr M. Koochesfahani of Michigan State University are jointly supported by the Division of Chemistry, the Division of Chemical Transport Systems and the Office of Multidisciplinary Activities of the Mathematical and Physical Sciences Directorate for their interdisciplinary collaboration on new molecule-based optical diagnostic techniques to measure flow on small spatial scales. They will use newly synthesized fluorescent tracers based on caged laser dye molecules and nanocrystalline quantum dots to image flows at speeds of less than 1 mm/s. New optical techniques will be developed for the quantitative measurement of multivariable flow properties (e.g., flow velocity field, temperature, concentration) and transport in small dimensions. The diagnostics will interrogate important fundamental principles of flows in microchannels including transport to within 50-150 nm of surfaces. Understanding the flow behavior in microchannels is a key step in the development of active flow and mixing control on small spatial length scales. These principles defined from these flow studies will be incorporated in microchannels that contain Distributed Feedback (DFB) lasers as optical sensor elements. The integration of flow control and mixing with DFB architectures may lead to unprecedented analytical sensitivity on exquisitely small length scales. These principles are the underpinning of many emerging microdevice technologies, especially microsensors and microreactors. Collaborative Research in Chemistry (CRC) awards are given to interdisciplinary teams of scientists working on problems of broad chemical interest. The emphasis in these awards is on new collaborative modes of research and training.