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Metastable Crystalline AuGe Catalysts Formed During Isothermal Germanium Nanowire Growth

Published

Author(s)

Andrew D. Gamalski, Jerry Tersoff, Renu Sharma, Caterina Ducati, Stephan Hofmann

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

Citation

Gamalski, A. , Tersoff, J. , Sharma, R. , Ducati, C. and Hofmann, S. (2012), Metastable Crystalline AuGe Catalysts Formed During Isothermal Germanium Nanowire Growth, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=910747 (Accessed April 21, 2024)
Created June 18, 2012, Updated October 12, 2021