Physics Colloquium: Mehrdad Kiani, Cornell University
Wednesday, February 5, 2025 4pm to 5pm
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Higgins Hall, Chestnut Hill, MA 02467
Materials-agnostic Nanomanufacturing
Fabrication of nanostructures with tight control of chemical composition, size, and crystal structure over wafer-scale distances is a major bottleneck for accelerated materials discovery and screening. At the length scale of modern-day devices and components, micro/nanomanufacturing as a fabrication modality offers the greatest benefit when considering morphology, mechanical stability, and performance. New breakthroughs in nanomanufacturing require an improved understanding of confinement effects that dominate during fabrication. In this talk, I will detail how enhanced diffusivity and creep at the nanoscale can be exploited to further develop a new nanomanufacturing technique, thermomechanical nanomolding (TMNM). I will show how TMNM can enable controlled tuning of grain size/crystallographic orientation in 2D nanostructures over wafer-scale distances and stabilization of unexplored metastable compounds. Finally, I will discuss how novel nanofabrication techniques coupled with in situ electron microscopy can enable new insights into confinement effects at the nanoscale, focusing on phase stability and fracture.
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