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Publication Citation: Metastable Crystalline AuGe Catalysts Formed During Isothermal Germanium Nanowire Growth

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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
Volume: 108
Issue: 25
Keywords: Ge nanowire; environmental transmission electron microscope; nanoscale system
Research Areas: Electron microscopy (EM, TEM, SEM, STEM)
PDF version: PDF Document Click here to retrieve PDF version of paper (255KB)