|
4:00 p.m.
1101 A. James Clark Hall, University of Maryland
For More Information:
Thomas E. Murphy
301-405-0030
tem@umd.edu
Abstract: Entropy is typically associated with disorder; yet, the counterintuitive notion that particles with no interactions other than excluded volume might self-assemble from a fluid phase into an ordered crystal has been known since the mid-20th century. First predicted for rods, and then spheres, the thermodynamic ordering of hard particle shapes by nothing more than crowding is now well established. In recent years, surprising discoveries of entropically ordered colloidal crystals of extraordinary structural complexity have been predicted by computer simulation and observed in the laboratory. Colloidal quasicrystals, clathrate structures, and structures with large and complex unit cells typically associated with metal alloys can all self-assemble from disordered phases of identical nanoparticles due solely to entropy maximization. In this talk, we show how entropy alone can produce order and complexity beyond that previously imagined. We introduce the notion of the entropic bond and show how methods used by the quantum community to predict atomic crystal structures can be used to predict entropic colloidal crystals.
Biosketch: Sharon C. Glotzer is the Anthony C. Lembke Department Chair of Chemical Engineering, the John Werner Cahn Distinguished University Professor of Engineering, and the Stuart W. Churchill Collegiate Professor of Chemical Engineering at the University of Michigan, where she is also Professor of Materials Science & Engineering, Professor of Physics, Professor of Macromolecular Science & Engineering, and Professor of Applied Physics. She is a member of the National Academy of Sciences, and a fellow of the American Academy of Arts and Sciences, the American Physical Society, and the American Association for the Advancement of Science. She received a B.S. degree from the University of California, Los Angeles, and a Ph.D. degree from Boston University, both in physics. Prior to joining the University of Michigan in 2001, she worked for 8 years in the Materials Science & Engineering Laboratory at the National Institute of Standards and Technology (NIST) as co-founder and Director of the NIST Center for Theoretical and Computational Materials Science. Glotzer's research on computational assembly science and engineering aims toward predictive materials design of colloidal and soft matter, with current emphasis on shape, packing, and assembly pathways. She has hundreds of refereed publications and has presented over 300 plenary, keynote, and invited talks around the world. Glotzer was the recipient of the Charles M.A. Stine Award in Materials Science and Engineering from the American Institute of Chemical Engineers holds a National Security Science and Engineering Faculty Fellowship from the Office of the Secretary of Defense and was named a 2012 Simons Investigator.
This Event is For: Public • Campus • Clark School • All Students • Graduate • Undergraduate • Prospective Students • Faculty • Staff • Post-Docs • Alumni • Employers • Corporate • Donors • Parents and Family
|
Event Information
