NSF/Sandia: Novel Thermometry Techniques and Nanostructured Surfaces to Enhance Micro- and Meso-Scale Thermal Management Technologies

国家科学基金项目编号：CTS-0625865主要研究者： 尤达，南联盟： 格鲁吉亚技术研究公司GA技术研究所提案标题：NSF/Sandia：新的测温技术和纳米结构表面，以加强微观和介观尺度的热管理技术这一提案是在响应计划征集NSF 05-616在热传输和流体力学的重点领域。这项研究提出了开发纳米结构表面的液体冷却。 这样的特征（例如碳纳米管）极大地增加了表面积并且可以增强微尺度对流热传递。这些表面具有显著提高单相液体冷却的热性能和管理局部“热点”的潜力。“开发和评估有效的中尺度液体冷却系统还需要测量复杂管道系统中的液相和壁面温度，这些管道系统的尺寸与人类头发的直径相当。 然而，几乎没有任何实用的测温技术可以测量这种小的回旋几何形状中的温度而不干扰冷却剂流动，从而影响冷却性能。因此，这项研究还将开发新的非侵入式高空间分辨率测温技术，可用于复杂的微系统。 然后，这些技术将用于表征和优化纳米结构表面，以增强对流传热。 这项工作的智力价值在于开发出表面包覆碳纳米管的微通道。 它们将在硅中制造，并结合加热和嵌入式温度传感器来表征整体热性能。 此外，局部热性能将使用倏逝波荧光测温法（EFT）进行表征。为了将非侵入式测温技术扩展到复杂的硅结构，将开发一种新的红外（IR）测温技术，该技术可以通过利用IR量子点的温度敏感特性来非侵入式地测量不透明的硅微通道中的温度，至少在可见波长处。 从这项工作中获得的基本知识将对电子系统的微冷却系统的未来发展以及对其表征的实验诊断产生广泛的影响。 这项研究对人们的影响将包括与市中心的高中生合作，开发基于网络的纳米到微米级技术的教育材料。

ABSTRACTNational Science FoundationProposal Number: CTS-0625865Principal Investigator: Yoda, MinamiAffiliation: Georgia Tech Research Corporation GA Institute of Technology Proposal Title: NSF/Sandia: Novel Thermometry Techniques and Nanostructured Surfaces to Enhance Micro- and Meso-Scale Thermal Management TechnologiesThis proposal was submitted in response to Program Solicitation NSF 05-616 in the focus area ofthermal transport and fluid mechanics. This research proposes to develop nanostructured surfaces for liquid cooling. Such features (e.g. carbon nanotubes) greatly increase surface area and may enhance microscale convective heat transfer. These surfaces have the potential to dramatically increase the thermal performance of single-phase liquid cooling and manage local "hot spots."Developing and evaluating effective mesoscale liquid cooling systems also requires measuring liquid-phase and wall surface temperatures in complex piping systems with dimensions comparable to the diameter of a human hair. Yet there are few if any practical thermometry techniques that can measure temperatures in such small convoluted geometries without disturbing the coolant flow, thereby affecting cooling performance. This research therefore will also develop novel nonintrusive high spatial resolution thermometry techniques that can be used in complex microsystems. These techniques will then be used to characterize and optimize the nanostructured surfaces for enhanced convective heat transfer. The intellectual merit of the work is in the development of microchannels with carbon nanotube-encrusted surfaces. They will be fabricated in silicon and incorporate heating and embedded temperature sensors to characterize overall thermal performance. In addition, local thermal performance will be characterized using evanescent wave fluorescence thermometry (EFT). To extend nonintrusive thermometry techniques to complex silicon structures, a new infrared (IR) thermometry technique will be developed that can nonintrusively measure temperature in silicon microchannels which are opaque, at least at visible wavelengths by exploiting the temperature-sensitive characteristics of IR quantum dots. The fundamental knowledge derived from this work will have Broad Impacts on the future development of micro cooling systems for electronic systems and in the experimental diagnostics available for their characterization. The impact of the research on people will include work with inner-city high school students to develop Web-based educational materials on nano- to microscale technology.