报告内容摘要：

Rapid progress in synthesis and processing of nanomaterials has created a pressing demand for greater scientific understanding of thermal transport at the nano-scale. Employing the related interweaving surface/interface and confinement phenomena, some key research paradigms of importance to energy conversion and transport will be discussed in this talk. First, I will present phonon transport properties of variety of materials under strained conditions in many emerging applications, such as thermoelectric energy conversion and heat dissipation of nanoelectronics. Ab initio based anharmonic lattice dynamics combined with Boltzmann transport equation (BTE) is used to this end with broad forms of materials targeted: from low to high pressure phases, from compression to tension. In the second part of this talk, phonon transport properties of a representative hybrid organic-inorganic perovskite solar cell (methylammonium lead triiodide perovskite, CH3NH3PbI3) will be presented. With direct nonequilibrium ab initio molecular dynamics simulation, we illustrate the details of the mysterious vibration of the methylammonium cluster and present an unambiguous picture of how the organic cluster interacting with the inorganic cage and how the collective motions of the organic cluster drags the thermal transport, which provide fundamental understanding of the ultralow thermal conductivity of CH3NH3PbI3. The results of these investigations are likely to provide a major advancement to the fundamental understanding of phonon behavior under various material conditions and rational optimization of relevant materials, with the potential to make a clear contribution to the energy efficiency of the future.
 
报告人简介：

Ming Hu received the B.S. degree in mechanics from University of Science and Technology of China (USTC) in 2001 and the Ph.D. degree in solid mechanics from Institute of Mechanics, Chinese Academy of Sciences (CAS) in 2006. After several years of research at Rensselaer Polytechnic Institute (RPI) and Swiss Federal Institute of Technology (ETH) Zurich, he joined RWTH Aachen University in Germany in February 2013. His current research interests include micro-/nano-scale thermal transport in novel energy systems, interfacial heat transfer for advanced thermal management, and non-Fourier heat conduction. Dr. Hu has authored and co-authored 4 book chapters and 71 high impact journal papers, including 9 Nano Letters, 14 Physical Review B, 4 Nanoscale, 10 Applied Physics Letters, with total citation over 1400 times. He has been invited as reviewer for more than 30 international journals, such as Nature, Nano Letters, ACS Nano, etc.