Our research investigates the way that thermal and electrical energy moves and converts between each other in materials. We tend to focus on nanoscale materials and interfaces. More formally, our research investigates the transport, conversion, and control of thermal and electrical energy. We are interested in both the fundamental limits of phonon and electron transport, and in materials and devices that can better control this energy. We apply this research to engineering challenges in material interfaces, thermal management, and energy-efficient computing. Our capabilities include the structural and chemical characterization of materials at extreme temperatures, measurements of thermal conductivity and thermal boundary conductance, and the fabrication and testing of nanoscale devices.