报告介绍

报告介绍

报告介绍 报告摘要: Hydroxyapatite apatite (HA) is the most important ceramic material for biomedical applications because of its similarity to biominerals in bone and tooth. Ability of HA formation in physiological environments has been considered as a criterion to evaluate bioactivity of materials for dental and orthopedic applications. However, we should ask ourselves how much we know about hydroxyapatite ...

报告介绍

报告介绍 单分子测控及动力学研究是进一步深刻理解微观物质世界的一个重要途径，为研发新型单分子器件提供基础，为解决重大科技应用问题提供可能途径。本报告将介绍基于扫描隧道显微镜和纳米孔两种实验手段进行单分子测控和动力学研究的工作及设想。主要内容：（1）利用传统扫描隧道显微镜对单个分子的研究。包括单分子成像，局域电子态密度，声子-电子耦合，分子搬运，化学键修饰等。（2）新型扫描隧道显微镜的研发。包括光助扫描隧道显微镜...

报告介绍

报告介绍

报告介绍 Spin polarized tunneling has been extensively explored in modern spintronic studies. In addition to its leading role in tunnel magnetoresistance (TMR), the state-of-art technology for magnetic sensing and nonvolatile memory, it is also a solution to the conductivity mismatch problem for spin polarized transport into semiconducting spin transistors.Spin filter (SF) tunneling is one of its latest deve...

报告介绍 In this seminar, I will present our recent works on electronic properties and devices applications of carbon based materials, especially graphene and carbon nanotubes. We systematically investigated the mechanical, electronic properties of graphene, and the related device applications. We discovered interesting quantum effects of graphene edge stresses, which would in turn manifest in mechanical edg...

报告介绍

报告介绍 Abstract: In this talk, he will discuss the following two subjects: (i) quantum criticality and unconventional superconductivity in the heavy fermion (HF) systems; and (ii) the superconducting pairing state in materials lacking inversion symmetry. The study of quantum critical phenomena has attracted considerable attention because of the fascinating physical properties caused by quantum fluctuations...

报告介绍 极低温下输运性质的测量，是对关联电子材料基态准粒子行为的直接观察，对研究关联电子体系的基态具有重要意义。我们通过测量极低温（至20 mK）和强磁场（至17 T）下的电阻率和热导率，对几个关联电子材料进行了研究：1）确定了Na0.7CoO2的基态仍然是费米液体；2）在反铁磁体Nd2CuO4中首次观察到了T3温度依赖关系的反铁磁自旋波热导率；3）确定了超导体CuxTiSe2的超导能隙具有s波对称性；4）初步确定了铁基超导体BaFe1.9Ni0.1As2、FeS...

报告介绍 成家杨 (Jay J. Cheng) 博士是美国北卡罗莱纳州立大学生物和环境工程系终身正教授。1982年本科毕业于江西工学院（现南昌大学）化学工程专业，1996年获美国俄亥俄州辛辛那提大学环境工程专业博士学位。 1997年在北卡罗莱纳州立大学生物与农业工程系任助理教授， 2003和2008年分别提升为副教授和正教授。 成家杨教授在生物质能源包括利用木质纤维素制备燃料乙醇和环境工程（利用水生植物Duckweed 进行污水处理）等领域的研究处于国际领...

报告介绍 量子光机械系统作为一个全新的研究领域, 在最近几年获得了令人瞩目的发展。我们提出应用激光光镊束缚和冷却玻璃球,把玻璃球质心运动冷却到量子基态, 制作一个达到量子极限的微小探测器。我们已经成功用光镊在空气和真空里束缚玻璃球, 并研究了小球在空气里的布朗运动。我们观测到了在很短的时间尺度下, 布朗运动不符合爱因斯坦的理论。我们还首次成功测量了布朗运动的瞬时速度。这种超灵敏光镊技术还有很多其它的应用,比如用来探测单...

报告介绍 Abstract: The force exerted by photons is of fundamental importance in light- matter interactions. For example, in free space, optical tweezers have been widely used to manipulate atoms and microscale dielectric particles. This optical force is expected to be greatly enhanced in a nanophotonic waveguides in which light is highly concentrated with orders of magnitude larger intensity. Recently, we re...

报告介绍