CUED Publications database

Metastable crystalline AuGe catalysts formed during isothermal germanium nanowire growth

Gamalski, AD and Tersoff, J and Sharma, R and Ducati, C and Hofmann, S (2012) Metastable crystalline AuGe catalysts formed during isothermal germanium nanowire growth. Physical Review Letters, 108. ISSN 0031-9007

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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. © 2012 American Physical Society.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:23
Last Modified: 08 Dec 2014 02:32
DOI: 10.1103/PhysRevLett.108.255702