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Ju LiAssistant ProfessorPh.D., Massachusetts Institute of Technology, 2000 Tel. (614) 292-9743 Office: 494 Watts Hall
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Development of robust analytical and computational approaches to the modeling of the structural and functional properties of materials, including Ni- and Ti-based superalloys, fuel cell catalysts, ultrahigh-temperature ceramics, hydrogen storage materials, electroactive polymers, and metallic glasses. In these endeavors, Dr. Li is leading the rapidly growing multiscale modeling effort in bridging continuum, atomistic and electronic scales, at the interface of nanoscience, biology, and applied mathematics.
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Topological remodeling of the red blood cell cytoskeleton. See Biophysical J. 88 (2005) 3707, and a Technology Review report (click image for larger view, 420K). |
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A solitary electron wave (ripples of red and blue, center) travels along the organic conductor polyacetylene, causing the polymer chain to bend in the middle. This topological defect is charge and strain carrier in the system (Proceedings of the National Academy of Sciences USA 103 (2006) 8943; physorg.com/news71409967.html) (click image for larger view). |
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(click images for larger view) Molecular dynamics simulation of nanoindentation in aluminum thin film demonstrates the nucleation and evolution of dislocations that mediates plastic deformation in crystalline solids. In these images, the operation of three equivalent sources of prismatic dislocation loops left parallel piped slip marks on the bottom surface, and threading dislocations connect the top and bottom. The correlation of these simulations with actual experiments enables exact prediction of both the location and character of homogeneously nucleated defects under large strain, which is of fundamental importance in understanding incipient plasticity. For details, see Nature 418 (2002) 307, Science 298 (2002) 807. |
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