应土木工程学院李惠教授邀请，美国加州大学洛杉矶分校材料科学与工程系黄昱教授和段镶锋教授于7月11日来访我校，访问期间将举办学术报告进行交流，欢迎化工与化学学院、材料学院、土木工程学院及其他学院师生参加。
报告题目：
1. Creating High-Performance Heterogeneous Catalysts through Surface Engineering
2. Van der Waals Integration a New Pathway to Artificial Heterostructures and High Performance Devices
报 告 人：黄昱教授、段镶锋教授
报告时间：7月11日 15:00
报告地点：活动中心214
主办单位：国际合作处
承办单位：化工与化学学院
报告人简介：
Dr. Yu Huang （黄昱）is a professor in the Department of Materials Science and Engineering at University of California Los Angeles (UCLA). She received her B.S. in Chemistry from University of Science and Technology of China (USTC), and her Ph.D in physical chemistry and M.A in Chemistry from Harvard University. Before she embarked on her independent career at UCLA She was awarded the prestigious Lawrence Fellowship and held a joint postdoctoral position with Lawrence Livermore National Lab (LLNL) and Massachusetts Institute of Technology (MIT). At UCLA Prof. Huang explores the unique technological opportunities that result from the structure and assembly of nanoscale building blocks. Her research focuses on mechanistic understanding of nanoscale phenomena and on exploiting the unique properties of nanoscale materials for various applications. Taking advantage of the unique roles of nanoscale surfaces and interfaces, Prof. Huang is creating methodologies to apply the latest developments in nanoscale materials and nanotechnology for probing nanoscale processes that can fundamentally impact a wide range of technologies including materials synthesis, catalysis, fuel cells, and devices applications. Prof. Huang’s achievements have gained her international and national recognitions including the Materials Research Society (MRS) Fellow, the Royal Society of Chemistry (RSC) Fellow, the International Precious Metal Institute (IPMI) Carol Tyler Award, , the Presidential Early Career Award in Science and Engineering (PECASE), the National Institute of Health (NIH) Director’s New Innovator Award, the Defense Advanced Research Projects Agency (DARPA) Young Faculty Award, the World’s Top 100 Young Innovators award, the Sloan Fellowship, the International Union of Pure and Applied Chemistry (IUPAC) Young Chemist Award, and the Nano 50 Award.
Dr. Duan（段镶锋）received his B.S. Degree from University of Science and Technology of China in 1997, and Ph.D. degree from Harvard University in 2002. He was a Founding Scientist and then Manager of Advanced Technology at Nanosys Inc., a nanotechnology startup founded based partly on his doctoral research. Dr. Duan joined UCLA with a Howard Reiss Career Development Chair in 2008, and was promoted to Associate Professor in 2012 and Full Professor in 2013. Dr. Duan’s research interest includes nanoscale materials, devices and their applications in future electronic, energy and health technologies. Dr. Duan has published over 200 papers with over 50,000 citations, and holds over 40 issued US patents. For his pioneer research in nanoscale science and technology, Dr. Duan has received many awards, including MIT Technology Review Top-100 Innovator Award, NIH Director’s New Innovator Award, NSF Career Award, Alpha Chi Sigma Glen T. Seaborg Award, Herbert Newby McCoy Research Award, US Presidential Early Career Award for Scientists and Engineers (PECASE), ONR Young Investigator Award, DOE Early Career Scientist Award, Human Frontier Science Program Young Investigator Award, Dupont Young Professor, Journal of Materials Chemistry Lectureship, International Union of Materials Research Society and Singapore Materials Research Society Young Researcher Award, the Beilby Medal and Prize, the Nano Korea Award, and most recently International Society of Electrochemistry Zhao-Wu Tian Prize for Energy Electrochemistry. He is currently an elected Fellow of Royal Society of Chemistry and Fellow of American Association for the Advancement of Science.
报告摘要：
1. Creating High-Performance Heterogeneous Catalysts through Surface Engineering
Noble metal-based nanocrystals have played important roles in heterogeneous catalysis due to their high activity and chemical stability. Owing to the large surface to volume ratio at nanoscale slight changes in the surface structure of catalytic materials can have large impacts on the catalytic stability and activity. The composition, facet, and the topology of the top surface layers of a nanocatalyst eventually determine its performance in catalytic reactions. In this presentation, I will share our recent efforts on designing the surface compositions, structures and the overall morphology of noble metal catalysts to improve both catalytic activity and stability of nanocatalysts.
2. Van der Waals Integration a New Pathway to Artificial Heterostructures and High Performance Devices
The heterogeneous integration of dissimilar materials is a long pursuit of material science community and has defined the material foundation for modern electronics and optoelectronics. The typical material integration strategy such as chemical epitaxial growth usually involves strong chemical bonds and is typically limited to materials with strict structure match and processing compatibility. Alternatively, van der Waals integration, in which pre-formed building blocks are physically assembled together through weak van der Waals interactions, offers a bond-free material integration approach without lattice and processing limitations, as exemplified by the recent blossom of 2D vdW heterostructures. Here I will discuss van der Waals integration as a general material integration strategy for creating diverse artificial heterostructures with minimum integration-induced damage and interfacial states, enabling high-performing devices difficult to achieve with conventional “chemical integration” approach. Recent highlights include the formation of van der Waals metal/semiconductor contacts free of Fermi level pinning to reach the Schottky-Mott limit; the development of van der Waals thin films for high performance large area electronics; and the creation of a new class of van der Waals 2D-moecular superlattices with radically different layers yet atomic precision in each layer. I will conclude with a brief prospect on the potential of such heterostructures to unlock new physical limits and enable devices with unprecedented performance or entirely new functions beyond the reach of the existing materials, and the associated challenges.
化工与化学学院
2019年7月9日
