讲座题目🏃♂️➡️：NMR and the Grand Challenges of Metal-Organic Frameworks、Optical pumping of nuclear spins in diamond and GaAs 主讲人：Jeffrey A Reimer 教授 主持人：姚叶锋 开始时间：2019-10-11 14:00:00 讲座地址🧗🏼♂️：理科大楼A207 主办单位：物理与电子科学学院
报告人简介： Professor Jeffrey A Reimer is recognized worldwide for his contributions to understanding materials chemistry through the creative application of sophisticated spectroscopic and physical measurements. From the structure and properties of solar cells to instrumentation that probes the action of automobile catalysts under the high temperature and pressure; from lightweight polymers for structural materials to fuel cells and lithium battery materials; from the structure of metal organic frameworks for carbon capture to the electrical and optical control of nuclear polarization in semiconductors, Professor Reimer and his co-workers provided insight into the chemistry of materials systems aimed at environmental protection, human sustainability, and technological innovation. He is author or co-author of ~200 research publications, two books, and a variety of review articles. Professor Reimer is recognized for these works by election as a Fellow of the American Association for the Advancement of Science, a Fellow of the American Physical Society in the Division of Materials Physics, a Fellow of the International Society for Magnetic Resonance, and is a recipient of the Humboldt Research Award from Germany. In addition to his research publications, Professor Reimer is co-author (with T.M. Duncan) of the introductory text Chemical Engineering Design and Analysis (Cambridge University Press, 2nd edition, 2019), and the text Carbon Capture and Sequestration (with Berend Smit, Curt Oldenburg, Ian Bourg, World Scientific Press, 2013). Professor Reimer has won virtually every teaching award on the Berkeley campus - at the department, college, physical sciences, and campus level, including the Donald Sterling Noyce Prize for Excellence in Undergraduate Teaching in the Physical Sciences, the AIChE Northern California Section Award for Chemical Engineering Excellence in Academic Teaching, and the UC Berkeley Distinguished Teaching Award in 2003, the highest award bestowed on faculty for their teaching. His introductory textbook (Chemical Engineering Design and Analysis – an Introduction co-authored with T. Michael Duncan), focuses on teaching chemical engineers about the importance of design concepts early in their academic studies. Professor Reimer was born in Van Nuys, California and received his bachelor’s degree (with honors) from the University of California at Santa Barbara. He obtained his doctorate in chemical physics from the California Institute of Technology while working with physicists from Xerox PARC examining the chemistry and the physics of solar cell materials. Prior to his appointment at Berkeley, he conducted basic and applied research in semiconductor science and technology as a postdoctoral fellow at IBM Research in Yorktown Heights, New York. Professor Reimer was an Associate Dean of the Graduate School at Berkeley from 2000-2005, where he was responsible for UC Berkeley’s academic reviews of its ~100 PhD granting departments. He was Chair of Berkeley’s Department of Chemical and Biomolecular Engineering from 2006-2011, and then again from 2013 to present. He has served many times as the chair of the Academic Senate subcommittee on GSI affairs, working on policies and procedures for ensuring that doctoral students are prepared for the teaching profession. Finally, Professor Reimer serves as a member of the Board of Trustees for Franklin University Switzerland and served as the Chair of the Governing Board for the Council for Chemical Research in 2015.
报告内容： Seminar: “NMR and the Grand Challenges of Metal-Organic Frameworks” Metal-organic frameworks (MOFs) are a new class of inorganic framework materials that exhibit a wide variety of physical and chemical properties. MOFs are particularly interesting owing to the ability to systematically vary metal composition and framework ligands so as to create a universe of different materials by design. MOFs then become near-ideal platforms for understanding interfacial phenomena and catalysis since key variables, such as framework structure, chemistry and pore size, can all be tuned independently. Technological applications of MOFs have subsequently flourished in recent years. Several grand challenges remain, however, in understanding these compelling materials. Each of these grand challenges poses technical hurdles for analytical and structure-determination methods, yet nuclear magnetic resonance (NMR) spectroscopy has, in principle, the ability to address them all. In my lecture I will summarize previous and new research from my lab that uses NMR access points to address diffusion, reaction, defects, and structure within this fascinating class of materials. Seminar: “Optical pumping of nuclear spins in diamond and GaAs” Control of electron spins in semiconductors impacts the design and analysis of both solid-state quantum computation and spintronics devices; surprisingly, it also affords the opportunity to produce huge signals for analytical NMR and MRI. I will review several examples of control and preparation of nuclear spin angular momentum that work towards these ends, then focus on two examples: GaAs and diamond. In GaAs we have achieved optical and electrical control of nuclear polarization, including re-writable micron-scale patterns of nuclear polarization that involves no lithography, chemistry, or magnetic field gradients. The [NV-] center in diamond, however, presents puzzling phenomenology when optically pumped at high field (~7T), yet there is considerably more progress for low-field DNP of diamond. The most intriguing results include the construction and operation of a portable diamond polarizer that costs less than $5K and is easily integrated into commercial NMR instruments where one can, for example, conduct dual modality MRI and fluorescence imaging. |
