CAREER: Anharmonic Dynamics of Thermal Transport in Nanotransistors and Across Hard-Soft Interfaces

0954696 Sinha这个CAREER项目旨在通过控制相干性和非谐性效应来定制纳米结构中的声子输运现象。相干尺度现象在例如场效应晶体管中是突出的，而非谐性影响在分离硬物质和软物质的界面处的传输。该项目的长期目标是实现和推进从纳米电子学到纳米医学的相关应用。理论工具将被开发来分析相干效应，而新的实验将被设计和进行，以探测声子的光谱特性参与热输运在硬-软interfaces.Intellectual优点：在热输运过程中的非谐性（软物质）和相干性（硬物质）的作用进行系统的调查。声子波输运理论将被扩展到包括粒子样的行为，使预测在亚10纳米晶体管的热响应。还将开发一种新的时间分辨拉曼散射方法，以实验探测大分子频率中的温度依赖性非谐位移，从而提供一种深入了解软物质中声子非谐动力学的手段。更广泛的影响：该项目旨在对软物质和硬物质中的热传输以及分离这些材料的界面的热传输进行基本了解。这种理解可能会为开发小规模晶体管，发现新的癌症疗法和创造新的能量收集热电材料带来新的途径。该教育计划将激励多层次的学生追求能源转换和热科学方面的职业和研究。新的实验室经验将被纳入PI机构的本科实验室课程。同样，还将开设一门新的纳米运输研究生课程。将为K-12教师开发教学工具包，推广活动将包括夏令营，向高中女生介绍能量转换原理。

0954696SinhaThis CAREER project is aimed at tailoring phonon transport phenomena in nanostructures through the control of coherence and anharmonicity effects. Coherence-scale phenomena are prominent in, for example, field-effect transistors while anharmonicity affects transport at interfaces separating hard and soft matter. The long-term goal of this project is to enable and advance pertinent applications ranging from nanoelectronics to nanomedicine. Theoretical tools will be developed to analyze coherence effects, while novel experiments will be devised and conducted to probe the spectral properties of phonons participating in thermal transport at hard-soft interfaces.Intellectual Merit: A systematic investigation of the role of anharmonicity (in soft matter) and coherence (in hard matter) during thermal transport will be conducted. A phonon wave transport theory will be extended to include particle-like behavior to enable the prediction of thermal responses in sub-10 nanometer transistors. A novel time-resolved Raman scattering approach to experimentally probe temperature-dependent anharmonic shifts in the frequencies of macromolecules will also be developed, providing a means to gain insight into the anharmonic dynamics of phonons in soft matter. Broader Impacts: The project is aimed at developing a fundamental understanding of thermal transport in soft and hard matter, and across interfaces separating these materials. This understanding may lead to new pathways for developing small-scale transistors, discovering new cancer therapies, and creating novel energy harvesting thermoelectric materials. The education plan will motivate students at multiple levels to pursue careers and research in energy conversion and the thermal sciences. New laboratory experiences will be incorporated into undergraduate laboratory courses at the PI's institution. Likewise, a new graduate course in nanotransport will be developed. Teaching kits will be developed for K-12 teachers, and outreach will include summer camps to introduce energy conversion principles to high school girls.