UNS: Thermal Rectification and Heat Transfer Enhancement via Near-Field Radiation

1509691 Sangi Reddy，Pramod这项研究是为了了解能量如何在两个非常接近的表面之间流动，间隙小到10纳米。 由此产生的数据是重要的，因为获得的知识将有助于建立在小型设备中有效操纵能量流的方法。 已经有许多模型预测这些行为，但相对较少的实验结果存在，以验证或反驳他们。 这项拟议的研究将有助于模型验证。 该提案还纳入了广泛的外联活动，以吸引本科生和研究生以及代表性不足的少数群体参与研究。K-12学生的模块将包含新颖的原子力显微镜，这令人印象深刻。本计画旨在验证与否定奈米间隙平行平板间近场辐射之理论与数值研究。 PI已经成功地演示了200 nm间隙辐射的初步测量，并计划将差距减小到10 nm。 实验装置将用于验证材料和辐射整流器的许多组合，并提高量热计的性能（具有皮瓦分辨率）。 该实验设施正在开发的一个目前的NSF奖。 几个重要的问题，近场辐射传热纳米间隙将解决：（1）近场热传递极性双曲和双曲材料，（2）热整流，（3）高分辨率量热法。

1509691Sangi Reddy, PramodThis research is to understand how energy flows between two surfaces placed very close together, with gaps as small as 10 nano-meters. The resultant data are significant because knowledge gained will help establish methods of manipulating energy flow effectively in small devices. There have been many models predicting these behaviors, but relatively few experimental results exist to verify or disprove them. This proposed study will facilitate model validations. The proposal also incorporates extensive outreach activities to engage undergraduate and graduate students as well as underrepresented minorities in research. Modules for K-12 students will incorporate novel atomic force microscope, which is impressive. This project aims to validate and invalidate the developed theories and numerical studies on the near field radiation between nano-gap parallel plates. The PIs have successfully demonstrated preliminary measurements of the 200 nm gap radiation and plan to reduce the gap down to 10 nm. The experimental setup will be used to validate many combinations of materials and radiation rectifier and enhance the performance of calorimeter (with pico-Watt resolutions). The experimental facility is being developed on a current NSF award. Several significant questions regarding near-field radiation heat transfer in nano-gaps will be addressed: (1) near field heat transfer polar dielectrics and hyperbolic materials, (2) thermal rectification, and (3) high resolution calorimetry.