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Microscopic Study of the Spinodal Decomposition of Supported Eutectic Droplets During Cooling: PtGe/Ge{110}

[Image: see text] We embarked on an in situ low-energy electron microscopy, photo-electron emission microscopy, and selected area low-energy electron diffraction study during the cooling of huge eutectic droplets through the critical stages of the eutectic transition. On this journey through unchart...

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Autores principales: Zhang, Zhiguo, Poelsema, Bene, Zandvliet, Harold J.W., van Houselt, Arie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9289948/
https://www.ncbi.nlm.nih.gov/pubmed/35865794
http://dx.doi.org/10.1021/acs.jpcc.2c01356
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author Zhang, Zhiguo
Poelsema, Bene
Zandvliet, Harold J.W.
van Houselt, Arie
author_facet Zhang, Zhiguo
Poelsema, Bene
Zandvliet, Harold J.W.
van Houselt, Arie
author_sort Zhang, Zhiguo
collection PubMed
description [Image: see text] We embarked on an in situ low-energy electron microscopy, photo-electron emission microscopy, and selected area low-energy electron diffraction study during the cooling of huge eutectic droplets through the critical stages of the eutectic transition. On this journey through uncharted waters, we revealed an expected initial shrinking of the exposed area of the droplet, followed by an unanticipated expansion. We attribute this behavior to an initial fast amorphization of the interface between the droplet and surface, followed by the recrystallization of Ge expelled from the droplet at the interface. As a major surprise, we discovered the emergence of extensive “spaghetti”-like patterns, which are rationalized in terms of parallel Ge ripples oriented along, mainly, [−554] and [−55–4] directions. They emerge during spinodal decomposition when passing the eutectic temperature of the system. Their sides are defined by Ge{111} and Ge{11–1} vicinals covered with Pt-modified (√3 × √3) superstructures. The distance between adjacent ripples is about 18 nm.
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spelling pubmed-92899482022-07-19 Microscopic Study of the Spinodal Decomposition of Supported Eutectic Droplets During Cooling: PtGe/Ge{110} Zhang, Zhiguo Poelsema, Bene Zandvliet, Harold J.W. van Houselt, Arie J Phys Chem C Nanomater Interfaces [Image: see text] We embarked on an in situ low-energy electron microscopy, photo-electron emission microscopy, and selected area low-energy electron diffraction study during the cooling of huge eutectic droplets through the critical stages of the eutectic transition. On this journey through uncharted waters, we revealed an expected initial shrinking of the exposed area of the droplet, followed by an unanticipated expansion. We attribute this behavior to an initial fast amorphization of the interface between the droplet and surface, followed by the recrystallization of Ge expelled from the droplet at the interface. As a major surprise, we discovered the emergence of extensive “spaghetti”-like patterns, which are rationalized in terms of parallel Ge ripples oriented along, mainly, [−554] and [−55–4] directions. They emerge during spinodal decomposition when passing the eutectic temperature of the system. Their sides are defined by Ge{111} and Ge{11–1} vicinals covered with Pt-modified (√3 × √3) superstructures. The distance between adjacent ripples is about 18 nm. American Chemical Society 2022-06-30 2022-07-14 /pmc/articles/PMC9289948/ /pubmed/35865794 http://dx.doi.org/10.1021/acs.jpcc.2c01356 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Zhang, Zhiguo
Poelsema, Bene
Zandvliet, Harold J.W.
van Houselt, Arie
Microscopic Study of the Spinodal Decomposition of Supported Eutectic Droplets During Cooling: PtGe/Ge{110}
title Microscopic Study of the Spinodal Decomposition of Supported Eutectic Droplets During Cooling: PtGe/Ge{110}
title_full Microscopic Study of the Spinodal Decomposition of Supported Eutectic Droplets During Cooling: PtGe/Ge{110}
title_fullStr Microscopic Study of the Spinodal Decomposition of Supported Eutectic Droplets During Cooling: PtGe/Ge{110}
title_full_unstemmed Microscopic Study of the Spinodal Decomposition of Supported Eutectic Droplets During Cooling: PtGe/Ge{110}
title_short Microscopic Study of the Spinodal Decomposition of Supported Eutectic Droplets During Cooling: PtGe/Ge{110}
title_sort microscopic study of the spinodal decomposition of supported eutectic droplets during cooling: ptge/ge{110}
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9289948/
https://www.ncbi.nlm.nih.gov/pubmed/35865794
http://dx.doi.org/10.1021/acs.jpcc.2c01356
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