When 3:30 PM - 5:00 PM Jan 09, 2009
Where 1670 CSE
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Towards Rational Tailoring of Functional and Structural Nanomaterials: Nanowires (1-D), Graphene (2-D), and Nanocomposites (3-D)

Nitin Padture, Ohio State University

It is a truism that advanced nanomaterials and nanoscale phenomena are technology-enabling in both functional and structural applications. The nanomaterials-related research in my group encompasses both these areas.  This research is organized according to the dimensionality of the nanomaterials — 1-D, 2-D, 3-D — under the overarching theme of their rational tailoring.   In 1-D nanomaterials, I will present an overview of our ongoing research in the areas of synthesis, characterization, devices, and coupled functional properties of metal-oxide-metal heterojunction nanowires.  These novel 1-D structures with high quality end-on contacts are enabling fundamental size-effect studies of functional oxides without the influence of extraneous substrate effects.  In 2-D nanomaterials, I will present some new ideas about the use of basic fracture mechanics principles in site-specific stamping of few-layers graphene (FLG) patterns for possible high-throughput fabrication of FLG-based devices.  Finally, I will present some recent results and new concepts about 3-D ceramic/single-wall carbon nanotubes composites that possess unprecedented, hierarchical grain-boundary structures. These nanocomposites are beginning to show promising mechanical properties that could be tailored: toughness, strength, contact-damage resistance, and high-temperature creep.  In addition, the unique grain-boundary structures of these nanocomposites could allow tailoring of their electrical and thermal properties independently, offering true multifunctionality.

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