CRC: Micro Imaging for Sensory and Materials Applications

丹尼尔G. Nocera和Moungi G. Bawendi和Manoochehr M.密歇根州立大学的Koochesfahani得到了化学系、化学传输系统系和数学与物理科学理事会多学科活动办公室的共同支持，他们在新的基于分子的光学诊断技术上进行了跨学科合作，以测量小空间尺度上的流量。他们将使用基于笼状激光染料分子和纳米晶体量子点的新合成荧光示踪剂，以低于1 mm/s的速度对流动进行成像。将开发新的光学技术，用于多变量流动特性的定量测量（例如，流速场、温度、浓度）和小尺寸中的输送。诊断将询问微通道中流动的重要基本原理，包括在50-150 nm表面内的传输。了解微通道中的流动行为是发展小空间长度尺度上的主动流动和混合控制的关键步骤。从这些流动研究中定义的这些原则将被纳入微通道，包含分布反馈（DFB）激光器作为光学传感器元件。流控制和混合与DFB架构的集成可能会导致前所未有的分析灵敏度上精致的小长度尺度。这些原理是许多新兴微器件技术的基础，特别是微传感器和微反应器。化学合作研究奖（CRC）授予致力于广泛化学兴趣问题的跨学科科学家团队。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.