报告介绍 余桂华博士，2003年6月在中国科学技术大学取得学士学位并获本科生最高奖“郭沫若奖学金”，并于2003年7月前往美国哈佛大学深造攻读博士，师从美国科学院院士和世界纳米领域著名科学家Charles Lieber教授。2009年4月起开始美国斯坦福大学从事助理研究员工作。由于其在功能纳米材料组装与纳米器件制备集成等方面的突出成果，曾获2007年度全美材料学会（MRS）杰出研究生银奖，2010年度国际理论和应用化学联合会 （IUPAC）&ldq...

报告介绍

报告介绍 Metal and semiconductor nanocrystals show many unusual properties and functionalities, and can serve as model system to explore fundamental quantum and classical coupling interactions as well as building blocks of many practical applications. In this talk, I will show how to take the advantages of bottom-up chemical synthetic strategy to manipulate and fabricate artificial nanostructures that might ...

报告介绍

报告介绍 Four-probe STM is a “nano” version of a conventional four-probe station; it combines STM local imaging and spectroscopy functions with four-point contact electrical transport capability in a well-controlled sample environment at temperatures down to 8 K.  In this talk, I will give a brief overview on the capabilities of ORNL four-probe STM, and then provide a couple of examples to d...

报告介绍 Spin-optronics is a new emerging research area, which combines studies of spin and optical polarisation effects in solids with the ultimate goal of creating quantum optoelectronic devices. This is an interdisciplinary research field at the crossroads of fundamental physics, optoelectronics, and nano-technology. We present recent results on theoretical description of spin and polarization dynamics in...

报告介绍 We summarize models applied for interpretation of photoelectron emission spectra. The models are compared and the validity is discussed by comparison to various sets of experiments.It is found that the two step model gives a reasonable description of the rough processes. However the more detailed effects are only well described by a one-step model which includes effects of the core hole and of the s...

报告介绍 Interfaces in nanostructures, such as molecule/metal interfaces and edges, are crucial for the performance and reliability of devices. As the size of devices is reduced, nanostructure interfaces become more susceptible to thermal fluctuations. I will discuss our local probe measurements of interface fluctuations and I will show how interfaces at the nanoscale change dynamically due to electron scatt...

报告介绍 Structural control of nanomaterials is of paramount significance for nanodevice fabrication. This talk will highlight the concept, strategy, and scope of our recent works. We have so far demonstrated several basic concepts for the colloidal synthesis of complex nanostructures, for example, use of polymer shells as nano-capsules to protect the assembly of nanoparticles[3,4,6], development of methods ...

报告介绍 The fabrication of bio- and nanomaterial arrays in a controlled manner and the synthesis of novel nanomaterials have attracted significant attention due to their important applications in a number of fields, such as biology, sensors, devices, etc. In this talk, I will summarize the researches my group has done recently. This includes dip-pen nanolithography-based controlled fabrication of arrays of ...

报告介绍 Nanotechnology is the ability to design and control the structure of an object at all length scales from the atom up to macro scale. This presentation reports the main research work in Dr. Chang Ming Li’s group including the approaches to synthesize and characterize various nanostructure materials and further to explore the arts to investigate various advanced bionanosystems in bioelectronics,...

报告介绍 In hole-doped high Tc cuprate superconductors, the Nernst effect suggests that the superconducting transition comes from the loss of long-range phase coherence, instead of the vanishing of the pair condensate. We present the observation of diamagnetism of the pair condensate above Tc on various families of cuprates LSCO, Bi2201, Bi2212, and YBCO. The diamagnetic magnetization is measured using torqu...

报告介绍 完整报告题目：Solving the three-body Coulomb breakup problem in prolate spheroidal coordinates: Grid-based methods of finite element (FEM) combined with discrete variable representation (DVR) using exterior complex scaling (ECS)摘要：We seek to develop theoretical and computational methods for treating electron processes that are important in photon-driven chemistry and physics, which are currently ...

报告介绍 Single-molecule spectroscopy (SMS), as a family of ultra-sensitive analytical techniques, has been widely used in many research areas, especially in biology and nano science. In contrast to traditional ensemble measurements, single-molecule studies have already demonstrated their unique capability to resolve heterogeneity out of complex systems/processes and to clear up the ambiguity therein among p...

报告介绍 氧化锌作为一种经典的宽带隙材料，在过去的几十年里受到了人们广泛的关注。目前，由于氧化锌是具有最多种纳米结构的材料之一，因此其在未来纳米器件上的应用又开始引起人们的重视。本次报告内容基于第一性原理计算，介绍了掺杂和化学修饰对不同维度氧化锌纳米结构的电磁性质的影响。具体包括过渡金属掺杂的氧化锌团簇和块体材料的磁性耦合机制研究，氧化锌纳米带和纳米薄膜在化学修饰作用下的电磁性质转变以及在未来自旋电子和光电子...

报告介绍