Graphene-SiC Interface: Effect of Atomic Bonding Type on Thermal Transport

在本项目中，将开发一种基于稳态焦耳加热和同步拉曼光谱的新技术来测量和区分石墨烯及其衬底之间的温度。该技术使热成像在面外方向的纳米分辨率成为可能。系统地了解石墨烯和碳化硅之间的热传递，以及两种典型界面：范德华力界面和共价键界面如何影响该界面的热阻。原子模型将用于评估石墨烯-碳化硅界面的热阻，并补充实验数据，以提供一个交叉基准和补充石墨烯-碳化硅界面的热输运的深入和全光谱图像。对于基于石墨烯的器件和系统的热设计，该项目将建立一个关于范德华和共价键维持的界面热阻的重要定量知识库。更广泛的影响。这项研究的结果将被整合到爱荷华州立大学现有的和新的课程中。ISU的PERUSE项目将为本科生参与暑期研究提供便利。包括对K-12学生的推广，并将包括监督当地高中优等生的独立学习项目。

CBET - 1235852 PI: Xinwei Wang, Iowa State UniversityIn this project, a novel technology based on steady-state joule heating and simultaneous Raman spectroscopy will be developed to measure and distinguish the temperature between graphene and its substrate. This technology enables nanometer resolution in the out-of-plane direction for thermal mapping. Systematic knowledge will be built about thermal transport between graphene and SiC, and how this interface thermal resistance is affected by two typical interfaces: interface featuring Van der Waal force and interface with covalent bond. Atomistic modeling will be conducted to evaluate the graphene-interface thermal resistance and complement the experimental data to provide a cross-benchmarked and complemented in-depth and full-spectrum picture of the thermal transport at graphene-SiC interface. For thermal design in graphene-based devices and systems, this project will establish an important quantitative knowledge base about the interface thermal resistance sustained by Van der Waals and covalent bonds. Broader impacts. The results of the research will be integrated into existing and new courses at Iowa State University. Undergraduate participation in summer research will be facilitated through the PERUSE program at ISU. Outreach to K-12 students is included, and will involve supervision of independent study projects by top students from local high schools.