Surface-dependent scenarios for dissolution-driven motion of growing droplets

Abstract Nano-droplets on a foreign substrate have received increasing attention because of their technological possible applications, for instance to catalyse the growth of nanowires. In some cases the droplets can move as a result of a reaction with the substrate. In this work we show that the sub...

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Autores principales:	Stefano Curiotto, Frédéric Leroy, Fabien Cheynis, Pierre Müller
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8084073f760842ac8beae491f6476c40
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spelling	oai:doaj.org-article:8084073f760842ac8beae491f6476c402021-12-02T16:07:02ZSurface-dependent scenarios for dissolution-driven motion of growing droplets10.1038/s41598-017-00886-22045-2322https://doaj.org/article/8084073f760842ac8beae491f6476c402017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00886-2https://doaj.org/toc/2045-2322Abstract Nano-droplets on a foreign substrate have received increasing attention because of their technological possible applications, for instance to catalyse the growth of nanowires. In some cases the droplets can move as a result of a reaction with the substrate. In this work we show that the substrate orientation, the surface morphology and the shape of the pits etched in the substrate by the droplets affect the droplet motion, so that a single mechanism (droplet-induced substrate dissolution) may lead to several unexpected droplet dynamics. The experiments are carried out by low energy electron microscopy on Au-Si and Au-Ge, which are model systems for studying liquid droplet alloys. Studying in-situ the behaviour of Au droplets on various Si and Ge surfaces, we describe a subtle interplay between the substrate orientation, the surface defects, and the droplet motion. Our observations allow a deep understanding of the interfacial mechanisms at the origin of the alloy formation and the associated droplet motion. These mechanisms are based on events of substrate dissolution/recrystallization. The outcomes of this work highlight the importance of the etching anisotropy on the droplet-substrate behaviours, and are essential in the perspective of positioning liquid alloy droplets used for instance as nanowire catalysts.Stefano CuriottoFrédéric LeroyFabien CheynisPierre MüllerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Stefano Curiotto Frédéric Leroy Fabien Cheynis Pierre Müller Surface-dependent scenarios for dissolution-driven motion of growing droplets
description	Abstract Nano-droplets on a foreign substrate have received increasing attention because of their technological possible applications, for instance to catalyse the growth of nanowires. In some cases the droplets can move as a result of a reaction with the substrate. In this work we show that the substrate orientation, the surface morphology and the shape of the pits etched in the substrate by the droplets affect the droplet motion, so that a single mechanism (droplet-induced substrate dissolution) may lead to several unexpected droplet dynamics. The experiments are carried out by low energy electron microscopy on Au-Si and Au-Ge, which are model systems for studying liquid droplet alloys. Studying in-situ the behaviour of Au droplets on various Si and Ge surfaces, we describe a subtle interplay between the substrate orientation, the surface defects, and the droplet motion. Our observations allow a deep understanding of the interfacial mechanisms at the origin of the alloy formation and the associated droplet motion. These mechanisms are based on events of substrate dissolution/recrystallization. The outcomes of this work highlight the importance of the etching anisotropy on the droplet-substrate behaviours, and are essential in the perspective of positioning liquid alloy droplets used for instance as nanowire catalysts.
format	article
author	Stefano Curiotto Frédéric Leroy Fabien Cheynis Pierre Müller
author_facet	Stefano Curiotto Frédéric Leroy Fabien Cheynis Pierre Müller
author_sort	Stefano Curiotto
title	Surface-dependent scenarios for dissolution-driven motion of growing droplets
title_short	Surface-dependent scenarios for dissolution-driven motion of growing droplets
title_full	Surface-dependent scenarios for dissolution-driven motion of growing droplets
title_fullStr	Surface-dependent scenarios for dissolution-driven motion of growing droplets
title_full_unstemmed	Surface-dependent scenarios for dissolution-driven motion of growing droplets
title_sort	surface-dependent scenarios for dissolution-driven motion of growing droplets
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/8084073f760842ac8beae491f6476c40
work_keys_str_mv	AT stefanocuriotto surfacedependentscenariosfordissolutiondrivenmotionofgrowingdroplets AT fredericleroy surfacedependentscenariosfordissolutiondrivenmotionofgrowingdroplets AT fabiencheynis surfacedependentscenariosfordissolutiondrivenmotionofgrowingdroplets AT pierremuller surfacedependentscenariosfordissolutiondrivenmotionofgrowingdroplets
_version_	1718384786578341888

Surface-dependent scenarios for dissolution-driven motion of growing droplets

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