报告介绍 报告摘要：量子级联激光器是一种利用半导体耦合量子阱子带间的电子跃迁而产生激光的单极性半导体激光器，是基于量子工程设计的、具有级联特征的、波长可大范围调节的中远红外波段激光器，目前的波长范围2.9-300微米，具有小型、高速响应、大功率、可集成等特点。在环境、医学、红外通信等方面具有广泛的应用前景。报告简要介绍量子级联激光器的工作原理和研究现状、中科院半导体所部分研究工作、目前存在的一些科学技术问题等。报告...

报告介绍 Air pollution and global climate change are important environmental issues that affect our society. In order to address these problems and to develop control strategies, advanced detection techniques and deeper understanding of atmospheric chemistry are required. This presentation focuses on (1) developments and applications of cavity ringdown spectroscopy (CRDS) and cavity enhance absorption spectr...

报告介绍 We propose a scheme for coherent rotation of the valley isospin of a single electron confined in a carbon nanotube quantum dot [1]. The scheme exploits the ubiquitous atomic disorder of the nanotube crystal lattice, which induces time-dependent valley mixing as the confined electron is pushed back and forth along the nanotube axis by an applied ac electric field. Using experimentally determined valu...

报告介绍 The negatively charged nitrogen-vacancy (NV-) centers in diamond, with their unique spin and optical properties, have emerged as a promising solid system for studying spin related phenomena. The local spin states of the NV- center can be accessed and manipulated optically at a single-site level, making it suitable for quantum information applications. Despite much research efforts, our understanding...

报告介绍 In this talk, He will summarize their new research on how to use FePt nanoparticles to catalyze H2O2 decomposition within cells for therapeutic applications, and how to apply core/shell M/FePt (M = Pd, NiPd or Au) nanoparticles to improve both activity and durability for the oxygen reduction reaction and methanol oxidation in polymer electrolyte membrane fuel cells.

报告介绍

报告介绍

报告介绍 报告人简介： 李子刚博士，2001年毕业于中国科学技术大学并获得学士学位，同年留学美国杜兰大学（Tulane University），师从合成化学家Chao-Jun Li教授，从事水相有机化学反应获得硕士学位；2004年开始在芝加哥大学（University of Chicago）师从Chuan He教授，从事化学生物学研究于2008年获得哲学博士学位（Ph.D.）。2009年起赴哈佛大学（Harvard University）化学与化学生物学系师从Gregory Verdine教授作为美国国家癌症中心博士后...

报告介绍 报告人简介 Hao Zeng received his B.S. degree from Nanjing University and Ph.D. from University of Nebraska. He was a postdoc fellow at IBM T. J Watson Research Center between 2001 and 2004. He joined the Physics Department at the University at Buffalo, the State University of New York as an Assistant Professor in 2004, and was promoted to Associate Professor with tenure in 2009. He is the recipient ...

报告介绍 报告人简介Kai-Ming Ho is Distinguished Professor of Liberal Arts and Sciences at Iowa State University and Senior Physicist at the Ames Laboratory (USDOE). He is a world leader in photonic crystals, and his research interests also include the area of electronic and structural properties of crystals, surfaces, clusters, metallic liquid and glass systems. Dr. Ho is a fellow of the American Physical So...

报告介绍

报告介绍 Topological order is a new kind of collective order beyond Landau's symmetry-breaking classification. Interesting in its own right, certain topologically ordered materials including the "chiral p-wave" superconductors and "non-Abelian" fractional quantum Hall (FQH) states may be used to realize fault-tolerant "topological" quantum computers. We have used both optical an...

报告介绍 In this talk, we will attempt to elucidate the important roles of single-atomic-layer steps and their electronic nature in determining surface morphological evolution and structural formation through case studies, including formation of atom wires, prevention of electrical breakdown in nanodevices, and nucleation behavior of carbon atoms on stepped transition-metal surfaces in the early stage of gra...

报告介绍 要向人们鼓吹物理化学的重要性时，若举臭氧洞为例，大概是最有说服力的；但对科学家而言，南极区的臭氧层于春天时迅速消失的事实，一直是值得探究的。过氧化氯之光化学，在极区臭氧层的催化性破坏中扮演主角。数十年来虽已有许多研究，直到最近，此分子光化学数据的准确度，仍不足以进行可靠的大气化学仿真；样品中无法避免的杂质，严重干扰着传统的测量。尤其在2007年，一项吸收光谱的实验数据，指出臭氧洞的形成无法用现有的化学模...

报告介绍 报告人简介: Prof. Gillian Gehring earned her doctoral degree at the University of Oxford and spent one year as a post doc with C. Kittel in Berkeley. She has taught physics for 21 years at Oxford before joining the staff of the Department of Physics & Astronomy at Sheffield University. Since her retirement, she's became an Emeritus Professor and has been devoting almost all her time to research....

报告介绍 Arrest of cell differentiation is one of the leading causes of leukemia and other cancers. Induction of cell differentiation using pharmaceutical agents has been clinically attempted for the treatment of these cancers. Epigenetic regulation may be one of the underlying molecular mechanisms controlling cell proliferation or differentiation. Here, we report on the identification and characterization o...