报告题目：Designing, Measuring, and Controlling Molecular and Supramolecular Devices

报  告 人：Paul S. Weiss

     Editor-in-Chief, ACS Nano

     Director, California NanoSystems Institute (CNSI)

     Fred Kavli Chair in NanoSystems Sciences

     California NanoSystems Institute (CNSI), University ofCalifornia,Los Angeles(USA)

报告时间：2012年06月13日(星期三)下午02:30

报告地点：超分子楼二楼圆形报告厅

报告摘要： We use molecular design, tailored syntheses, intermolecular interactions, and selective chemistry to direct molecules into desired positions to create nanostructures, to connect functional molecules to the outside world, and to serve as test structures for measuring single or bundled molecules. Interactions within and between molecules can be designed, directed, measured, understood, and exploited at unprecedented scales. Such interactions can be used to form precise molecular assemblies, nanostructures, and patterns, and to control and to stabilize function. We selectively test hypothesized mechanisms by varying molecular design, chemical environment, and measurement conditions to enable or to disable function and control using predictive and testable means. Critical to understanding these variations has been developing the means to make tens to hundreds of thousands of independent single-molecule measurements in order to develop sufficiently significant statistical distributions, while retaining the heterogeneity inherent in the measurements. We measure the electronic coupling of the molecules and substrates by measuring the polarizabilities of the connected functional molecules. The next step in such devices is to learn to assemble and to operate molecules together, both cooperatively and hierarchically, in analogy to biological muscles. We discuss our initial efforts in this area, in which we find both interferences and cooperativity.

Weiss教授简介

Research Interests:

Weiss leads an interdisciplinary research group which includes chemists, physicists, biologists, materials scientists, electrical and mechanical engineers, and computer scientists. Their work focuses on the atomic-scale chemical, physical, optical, mechanical and electronic properties of surfaces and supramolecular assemblies. He and his students have developed new techniques to expand the applicability and chemical specificity of scanning probe microscopies. They have applied these and other tools to the study of catalysis, self- and directed assembly, physical models of biological systems, and molecular and nano-scale electronics. They work to advance nanofabrication down to ever smaller scales and greater chemical specificity in order to connect, to operate, and to test molecular devices.

Additional Background:

       Paul S. Weiss received his S.B. and S.M. degrees in chemistry from MIT in 1980 and his Ph.D. in chemistry from theUniversityofCaliforniaatBerkeleyin 1986. He was a post-doctoral member of technical staff at Bell Laboratories from 1986-1988 and a Visiting Scientist atIBMAlmadenResearchCenterfrom 1988-1989. In 2009, he became Director of the California NanoSystems Institute, Professor of Chemistry and Biochemistry at UCLA, and Fred Kavli Chair in NanoSystems Sciences. Before coming to UCLA, he was a Distinguished Professor of Chemistry and Physics at thePennsylvaniaStateUniversity, where he began his academic career as an assistant professor in 1989. His interdisciplinary research group includes chemists, physicists, biologists, materials scientists, electrical and mechanical engineers, and computer scientists. Their work focuses on the atomic-scale chemical, physical, optical, mechanical and electronic properties of surfaces and supramolecular assemblies. He and his students have developed new techniques to expand the applicability and chemical specificity of scanning probe microscopies. They have applied these and other tools to the study of catalysis, self- and directed assembly, physical models of biological systems, and molecular and nano-scale electronics. They work to advance nanofabrication down to ever smaller scales and greater chemical specificity in order to connect, to operate, and to test molecular devices. He has published over 200 papers and patents, and has given over 400 invited and plenary lectures.