MSE Seminar - Dr. Uzi Landman, Georgia Tech

MSE Seminar
Event Date:
Monday, February 22, 2016 - 4:15pm
Location:
GTMI Auditorium

Small is Different: Computational Microscopy and Emergence in the Nanoscale

 Uzi Landman

  School of Physics, GeorgiaInstitute of Technology, Atlanta, GA30332

 

Finite materials systems of reduced sizes exhibit specific forms of aggregation, phases, structures and morphologies, quantized electronic shell structures, dimensionality cross-over, and size-dependent evolutionary patterns, which are manifested in unique, nonscalable, size-dependent physical and chemical properties. Indeed, when the dimensions of materials structures are reduced to the nanoscale, emergent phenomena often occurs, that are not commonly expected, or deduced, from knowledge gained at larger sizes. Discovery, characterization, understanding and possible utilization of such emergent behavior of materials in the nanoscale are among the major challenges of modern materials science. Computer-based classical and quantum computations and simulations are tools of discovery of nanoscale emergent behavior [1]. In this talk we discuss these issues, address some of the basic origins that underlie the unique behavior of material in the nanoscale, and highlight computational microscopy investigations of nanoscale phenomena in diverse systems, ranging from hydrodynamics of liquid nanojunctions and nanojets, shape-transitions of nanodroplets,  the stability and mechanics of nanocrystals and their superlattice assemblies, nanocatalysis by free and surface-supported clusters, and the emergence of highly-correlated molecular structures made of electrons confined in semiconductor quantum dots, as well as formed  by optically-trapped ultracold fermionc atoms.

 [1] U. Landman, “Materials by Numbers”, Proc. Nat. Acad. Sci. (USA) 102, 6671 (2005).

* Supported by the  Office of Basic Energy Sciences of the US Department of  Energy and the Air Force Office of Scientific Research 

Uzi Landman was born and raised in Israel where he received his education. He obtained a B.Sc degree from the HebrewUniversity in Jerusalem, a M.Sc. from the Weizmann Institute of Science and a D.Sc. from the Israel Institute of Technology (Technion). In between he played the accordion and arranged music for the Israeli Folk Ensemble and other groups, and performed  on stage, in Israel and Europe. Since 1970 he worked at UC Santa Barbara, the University of Illinois at Urbana, the Xerox research laboratories at Webster NY, and the University of Rochester NY. In 1977 he joined the School of Physics at the Georgia Institute of Technology (Georgia Tech) in Atlanta, where he is currently a Regents’ and Institute Professor, F.E. Callaway Chair, and serving as the founding director of the Georgia Tech Center for Computational Materials Science.  He received a number of awards, including: the 1992 Georgia Tech Distinguished Professor Award;  APS Jesse Beams outstanding research award; Feynman Prize in Nanothechnolog “for pioneering computations of materials properties at the nanoscle”; MRS Medal “for molecular dynamics simulations elucidating the microscopic behavior of solid and liquid interfacial junctions and atomistic processes of tribology”, the American Physical Society (APS) Aneesur Rahman Computational Physics prize, “for pioneering computations that have generated unique insights into the physics of materials at the nanometer length scale, thereby fostering new theoretical and experimental research”, and a  Humboldt Research award

Reception at 3:30 p.m. in GTMI Atrium