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

1509691Sangi Reddy，Pramod 这项研究旨在了解能量如何在两个非常靠近且间隙小至 10 纳米的表面之间流动。 由此产生的数据非常重要，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。 有许多模型可以预测这些行为，但验证或反驳它们的实验结果相对较少。 这项拟议的研究将促进模型验证。 该提案还包括广泛的外展活动，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 学生的模块将包含令人印象深刻的新型原子力显微镜。该项目旨在验证和无效有关纳米间隙平行板之间近场辐射的已开发理论和数值研究。 PI 已成功演示了 200 nm 间隙辐射的初步测量，并计划将间隙缩小至 10 nm。 该实验装置将用于验证材料和辐射整流器的多种组合，并增强量热计的性能（具有皮瓦分辨率）。 该实验设施正在根据当前的 NSF 奖项进行开发。 将解决有关纳米间隙中的近场辐射传热的几个重要问题：（1）近场传热极性电介质和双曲材料，（2）热整流，以及（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.