CME SEMINAR - 11:30am - David W. McComb, OSU MSE

[Longbrake, Patricia]

Please join us today at 11:30am in the Smith Seminar Room for the Condensed Matter Experiment Seminar presented by David W. McComb, Professor & Ohio Research Scholar, Director, Center for Electron Microscopy and Analysis, OSU Department of Materials Science and Engineering.

TITLE:  Probing complex interfaces and nanostructures using analytical electron microscopy

ABSTRACT:  Electron energy-loss spectroscopy (EELS) when performed in the scanning transmission electron microscope (STEM) is, arguably, the only technique that can provide information of chemistry and bonding in solid materials with near atomic scale spatial resolution.  The method has been widely utilized for the study of atomically sharp engineered interfaces grown by thin film deposition methods.  Applying STEM-EELS to the study of interfaces in natural materials and real devices is a more complex challenge.  In this talk I will use a number of examples to illustrate the insights that can be gained into the structure-property relationships in plasmonic nanostructures, multilayer films for solid oxide fuel cells (SOFCs), mineralised tissue, wear debris in tissue and organic solar cells.  The common aspect in all of these studies is the need to probe hard/soft or soft/soft interfaces between inorganic and organic materials.  This presents considerable challenges associated with sample preparation, electron beam damage and achievable spatial resolution.  I will show that it is possible in many cases to obtain both qualitative and quantitative chemical information that can significantly enhance our understanding in these complex systems.

I will also present the vision for the new Center for Electron Microscopy and Analysis (CEMAS) at the Ohio State University.  CEMAS is a major investment by OSU to create a magnet center to address imaging and characterization needs in the physical, life, biomedical and engineering sciences at OSU.  This custom-designed facility on West Campus will have an extensive range of SEM, TEM, FIB and sample preparation facilities, including two aberration-corrected S/TEMs and will be available to support research in all academic, government and industrial establishments in Ohio and beyond.

Thank you,
Trisch

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