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

0954696Sinha这个职业项目的目标是通过控制相干和非谐性效应来定制纳米结构中的声子传输现象。例如，相干尺度现象在场效应晶体管中很突出，而非谐性则影响分离硬物质和软物质的界面上的传输。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。将开发分析相干效应的理论工具，同时将设计和进行新的实验来探索参与硬-软界面热传输的声子的光谱特性。智力上的好处：将系统地研究非谐性(在软物质中)和相干(在硬物质中)在热传输中的作用。声子波输运理论将被扩展到包括类似粒子的行为，从而能够预测亚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，用于实验探测大分子频率随温度变化的非谐位移，为深入了解软物质中声子的非谐动力学提供了一种手段。更广泛的影响：该项目的目的是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有一个基本的了解。这种理解可能会为开发小型晶体管、发现新的癌症疗法以及创造新的收集能量的热电材料带来新的途径。该教育计划将激励多个层次的学生在能源转换和热科学领域追求职业和研究。新的实验室经验将被纳入到PI机构的本科实验室课程中。同样，还将开发一门新的纳米运输研究生课程。将为K-12教师开发教材包，外联活动将包括向高中女孩介绍能量转换原理的夏令营。

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.