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|Author(s):||Andrew D. Gamalski; J Tersoff; Renu Sharma; Caterina Ducati; Stephan Hofmann;|
|Title:||Metastable Crystalline AuGe Catalysts Formed During Isothermal Germanium Nanowire Growth|
|Published:||June 19, 2012|
|Abstract:||We observe the formation of metastable AuGe phases without quenching, during strictly isothermal nucleation and growth of Ge nanowires, using video-rate lattice-resolved environmental transmission electron microscopy. We explain the unexpected formation of these phases through a novel pathway involving large and abrupt variations in composition rather than temperature. The metastable catalyst has important implications for nanowire growth; and more broadly, the isothermal process provides both a new approach to growing and studying metastable phases, and a new perspective on their formation.|
|Citation:||Physical Review Letters|
|Keywords:||Ge nanowire, environmental transmission electron microscope, nanoscale system|
|Research Areas:||Electron microscopy (EM, TEM, SEM, STEM)|
|PDF version:||Click here to retrieve PDF version of paper (255KB)|