报告1：Heat Conduction and Phonon Engineering in Nanostructures
报告人：陈刚（美国麻省理工学院Warren and Towneley Rohsenow教授）
时间：2008年5月26日上午10:00
地点：清华大学逸夫技术科学楼1512会议室
摘要：Engineered materials with desirable thermal conductivities have a wide range of applications. Examples are thermoelectric energy converters that are built on materials with a low thermal conductivity but a large electrical conductivity, and heat exchangers that require high thermal conductivity materials. In this talk, I will discuss our experimental and theoretical studies on phonon transport in nanostructured materials, from single molecular chains to bulk nanocomposites. Emphasis will be placed on taking fundamental understanding based on molecular dynamics simulation, modeling, and experimentation to real world applications in energy and thermal management.
报告2：So, What does Nanotechnology Have to Do with Energy?
报告人：陈刚（美国麻省理工学院Warren and Towneley Rohsenow教授）
时间地点：2008年5月26日下午14:30
地点：北京大学理科2号楼2736会议室
摘要：Nanotechnology focuses on small scale effects. Energy is a global issue. Despite such disparities, there is a growing awareness that nanoscience and nanotechnology can have a profound impact on energy generation, storage, and utilization by exploiting the significant differences of energy states and transport between nanostructures and macrostructures. In this talk, I will discuss a few examples regarding the exploitation of nanoscale effects for solar energy conversion, hydrogen storage, and especially thermoelectric energy conversion. We will show that by exploring the interface scattering of electrons and phonons, the thermoelectric figure of merit can be improved in nanocomposites. Nanotechnology that can be scaled up for mass production to meet the energy conversion cost constraint will be emphasized.
报告3：Nanoscale Solar and Thermal Radiation — Photon Management and Beating Plank’s Law
报告人：陈刚（美国麻省理工学院Warren and Towneley Rohsenow教授）
时间：2008年5月27日上午10:00
地点：清华大学逸夫技术科学楼1512会议室
摘要：Thermal radiation transport in nanostructures differs from that in macrostructures due to various wave effects. This talk will discuss a few examples to illustrate such differences. One part of the talk will focus on the breakdown of Planck’s blackbody radiation law, which is considered to be the maximum that a surface can emit. Particularly emphasis will be given to surface phonon-polaritons that can store large amount of energy near the surface. Although theory has predicted that radiation heat transfer between such surfaces in the near-field can exceed that of Planck’s law, we will provide experimental evidence that demonstrates the failure of the Planck law at nanoscale, mediated by surface phonon-polariton exchange. The second part of the talk will discuss various ways to trap solar thermal radiation, geared towards solar thermal and solar photovoltaic applications.
陈刚教授简介：Dr. Gang Chen is currently the Warren and Towneley Rohsenow Professor at MIT. He obtained his Ph.D. degree from UC Berkeley in 1993. He was a faculty member at Duke University, University of California at Los Angeles, and moved to MIT in 2001. He is a recipient of the NSF Young Investigator Award, a Guggenheim Fellow, and an ASME Fellow. He has published extensively in the area of nanoscale energy transport and conversion and nanoscale heat transfer. He serves on the editorial boards for five journals in heat transfer and nanotechnology and chairs the advisory board of ASME Nanotechnology Institute.
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