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Monday, November 09

Teaching “Old” Materials “New” Tricks:
Site- and Shape-Specific Nanopatterning of Multifunctional Materials

Vinayak P. Dravid, Northwestern University, Evanston, IL
Physical Sciences Directorate Seminar
3:00 PM, Iran Thomas Auditorium (8600), Room A-103
Contact: Cathy L. Cheverton (chevertoncl@ornl.gov), 865.574.1144

Abstract

The natural evolution of functional materials architecture calls for their confinement in spatial and dimensional modes. Dimensional constraint arises from the emerging need for materials to be confined to 0- (i.e., nanocrystals), 1- (nanolines) and 2- (i.e., films/membranes) dimensions. The spatial confinement refers to inevitable attachment of materials to a substrate or an overlayer, for example. Further, by juxtaposing two or more functional materials in close proximity, there are exciting new opportunities for synergistic coupling of disparate phenomena in hybrid confined materials systems.

In this context, surface patterned nanoscale architecture and colloidal form of nanostructures offer unprecedented opportunities to revisit fundamental materials science phenomena; which flirt with thermodynamics of constrained systems on one hand and dynamics of nanoscale processes on the other.

The presentation will cover synthesis and patterning of materials down to nanoscale, with an emphasis on multifunctional phenomena. Advanced scanning probe, in-situ and ex-situ electron, ion and photon microscopy, spectroscopy and synchrotron x-ray scattering approaches are being employed to fathom the most intricate details of the internal "microstructure" of nanostructures, coupled with innovative tools to validate their functional identity and localized properties.

The presentation topics will range from nanopatterned oxides for investigating solid-state phenomena to magnetic nanostructures for biomedical applications.