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In situ analysis of catalyst composition during gold catalyzed GaAs nanowire growth.

Abstract：

:Semiconductor nanowires offer the opportunity to incorporate novel structures and functionality into electronic and optoelectronic devices. A clear understanding of the nanowire growth mechanism is essential for well-controlled growth of structures with desired properties, but the understanding is currently limited by a lack of empirical measurements of important parameters during growth, such as catalyst particle composition. However, this is difficult to accurately determine by investigating post-growth. We report direct in situ measurement of the catalyst composition during nanowire growth for the first time. We study Au-seeded GaAs nanowires inside an electron microscope as they grow and measure the catalyst composition using X-ray energy dispersive spectroscopy. The Ga content in the catalyst during growth increases with both temperature and Ga precursor flux.

journal_name

Nat Commun

journal_title

Nature communications

authors

Maliakkal CB,Jacobsson D,Tornberg M,Persson AR,Johansson J,Wallenberg R,Dick KA

doi

10.1038/s41467-019-12437-6

subject

Has Abstract

pub_date

2019-10-08 00:00:00

pages

4577

issue

1

issn

2041-1723

pii

10.1038/s41467-019-12437-6

journal_volume

10

pub_type

杂志文章

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