报告介绍 Wave interference and photon tunneling can result in significant enhancement of the radiative transfer for closely spaced objects. Nanoscale thermal radiation holds promise in near-field thermophotovoltaic devices, nanomanufacturing, and advanced thermal management. An overview of recent development in nanoscale thermal radiation will be given with an emphasis on engineering applications. The fundam...

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报告介绍 报告摘要 Positron Emission Tomography (PET) has become a popular imaging technique which provides in vivo information on the distribution of radiolabeled biomolecules. Due to the short halflife of PET isotopes, the discovery of general and reliable routes for the rapid incorporation of these radioactive atoms into biomolecules would be highly beneficial. In this presentation we will report our recen...

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报告介绍 近年来，低维纳米材料因其独特的物理、化学性质成为了研究的热点。相对电学和光学性质，人们对其热学性质的了解还较少。 应用分子动力学模拟和第一原理计算，我们理论研究了低维纳米材料中的热输运性质以及热电能量转换效率。我们理论提出利用同位素掺杂的方法可以提高半导体纳米线热电系数（ZT）40%以上。对合金半导体，如硅锗纳米线，因为其中的无序散射作用导致很强的声子局域化，可降低热导率80%以上，热电系数达到纯硅纳米线的4...

报告介绍 Among the more important of the numerous technological applications of titanium dioxide is its use as a photocatalyst to degrade organic pollutants or to perform other useful chemical transformations. The photocatalytic role of TiO2 could be greatly enhanced if a particular isomer that more effectively absorb the solar radiation at the Earth’s surface could be identified and synthesized. There...

报告介绍 Counterion-mediated asymmetric catalysis is an effective strategy in organocatalysis or metal-based catalysis. We have initiated an investigation of this strategy in the aza-Morita-Baylis-Hillman (MBH) reaction to address the rate and substrate scope issue. Trifunctional organocatalysts, each containing a Lewis base, a Brønsted base, and a Brønsted acid, have been designed and develope...

报告介绍 报告人简介：　　1985、1988 和1991 年先后获北京大学化学系理学学士、硕士和博士学位。1988 年7 月留校任教至今。1995 至1997 年初，作为洪堡学者在德国亚琛工业大学访问研究。1999 年，作为求槎学者在香港大学进行合作研究。2007 年当选为中国科学院化学学部院士。2006-2010年曾任北京大学化学与分子工程学院院长。现任北大化学学院教授(1999 年-)，长江学者(2002 年-)，北京分子科学国家实验室(筹)副主任，中国化学会常务理事，国...

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报告介绍 Wide band gap metal oxides as an important group of semiconductors have attracted great interests in recent years. They have important applications in electronics, optoelectronics, sensors, etc. In my talk, I will first briefly introduce our achievements on the controlled synthesis of 1-D nanostructures with different morphologies. Then, I will focus on our recent progress on transparent electronic ...

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报告介绍 报告摘要 The optical properties of organic optoelectronic devices depend strongly on the device structure due to the microcavity effect and plasmonic resonances. For organic LEDs (OLEDs), the optical properties include the change of emission wavelength, internal, out-coupling and external quantum efficiencies as well as the photon lifetime. For organic solar cells, the optical properties include lig...