Metastable crystalline AuGe catalysts formed during isothermal germanium nanowire growth.
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Authors
Gamalski, AD
Tersoff, J
Sharma, R
Ducati, Caterina https://orcid.org/0000-0003-3366-6442
Hofmann, Stephan https://orcid.org/0000-0001-6375-1459
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 changes 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.
Description
Keywords
0912 Materials Engineering
Journal Title
Phys Rev Lett
Conference Name
Journal ISSN
0031-9007
1079-7114
1079-7114
Volume Title
108
Publisher
American Physical Society (APS)
Publisher DOI
Sponsorship
European Research Council (279342)
A. D. G. acknowledges funding from the Marshall Aid Commemoration Commission and the National Science Foundation. S. H. and C. D. acknowledge funding from the Royal Society. S. H. acknowledges funding from ERC grant InsituNANO (n°279342).