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Phase transition and thermal stability of epitaxial PtSe(2) nanolayer on Pt(111)

This work relates to direct synthesis of the two-dimensional (2D) transition metal dichalchogenide (TMD) PtSe(2) using an original method based on chemical deposition during immersion of a Pt(111) surface into aqueous Na(2)Se solution. Annealing of the sample induces significant modifications in the...

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Autores principales: Tong, Yongfeng, Bouaziz, Meryem, Oughaddou, Hamid, Enriquez, Hanna, Chaouchi, Karine, Nicolas, François, Kubsky, Stefan, Esaulov, Vladimir, Bendounan, Azzedine
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9056341/
https://www.ncbi.nlm.nih.gov/pubmed/35516062
http://dx.doi.org/10.1039/d0ra04346j
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author Tong, Yongfeng
Bouaziz, Meryem
Oughaddou, Hamid
Enriquez, Hanna
Chaouchi, Karine
Nicolas, François
Kubsky, Stefan
Esaulov, Vladimir
Bendounan, Azzedine
author_facet Tong, Yongfeng
Bouaziz, Meryem
Oughaddou, Hamid
Enriquez, Hanna
Chaouchi, Karine
Nicolas, François
Kubsky, Stefan
Esaulov, Vladimir
Bendounan, Azzedine
author_sort Tong, Yongfeng
collection PubMed
description This work relates to direct synthesis of the two-dimensional (2D) transition metal dichalchogenide (TMD) PtSe(2) using an original method based on chemical deposition during immersion of a Pt(111) surface into aqueous Na(2)Se solution. Annealing of the sample induces significant modifications in the structural and electronic properties of the resulting PtSe(2) film. We report systematic investigations of temperature dependent phase transitions by combining synchrotron based high-resolution X-ray photoemission (XPS), low temperature scanning tunnelling microscopy (LT-STM) and low energy electron diffraction (LEED). From the STM images, a phase transition from TMD 2H-PtSe(2) to Pt(2)Se alloy monolayer structure is observed, in agreement with the LEED patterns showing a transition from (4 × 4) to (√3 × √3)R30° and then to a (2 × 2) superstructure. This progressive evolution of the surface reconstruction has been monitored by XPS through systematic de-convolution of the Pt4f and Se3d core level peaks at different temperatures. The present work provides an alternative method for the large scale fabrication of 2D transition metal dichalchogenide films.
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spelling pubmed-90563412022-05-04 Phase transition and thermal stability of epitaxial PtSe(2) nanolayer on Pt(111) Tong, Yongfeng Bouaziz, Meryem Oughaddou, Hamid Enriquez, Hanna Chaouchi, Karine Nicolas, François Kubsky, Stefan Esaulov, Vladimir Bendounan, Azzedine RSC Adv Chemistry This work relates to direct synthesis of the two-dimensional (2D) transition metal dichalchogenide (TMD) PtSe(2) using an original method based on chemical deposition during immersion of a Pt(111) surface into aqueous Na(2)Se solution. Annealing of the sample induces significant modifications in the structural and electronic properties of the resulting PtSe(2) film. We report systematic investigations of temperature dependent phase transitions by combining synchrotron based high-resolution X-ray photoemission (XPS), low temperature scanning tunnelling microscopy (LT-STM) and low energy electron diffraction (LEED). From the STM images, a phase transition from TMD 2H-PtSe(2) to Pt(2)Se alloy monolayer structure is observed, in agreement with the LEED patterns showing a transition from (4 × 4) to (√3 × √3)R30° and then to a (2 × 2) superstructure. This progressive evolution of the surface reconstruction has been monitored by XPS through systematic de-convolution of the Pt4f and Se3d core level peaks at different temperatures. The present work provides an alternative method for the large scale fabrication of 2D transition metal dichalchogenide films. The Royal Society of Chemistry 2020-08-20 /pmc/articles/PMC9056341/ /pubmed/35516062 http://dx.doi.org/10.1039/d0ra04346j Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Tong, Yongfeng
Bouaziz, Meryem
Oughaddou, Hamid
Enriquez, Hanna
Chaouchi, Karine
Nicolas, François
Kubsky, Stefan
Esaulov, Vladimir
Bendounan, Azzedine
Phase transition and thermal stability of epitaxial PtSe(2) nanolayer on Pt(111)
title Phase transition and thermal stability of epitaxial PtSe(2) nanolayer on Pt(111)
title_full Phase transition and thermal stability of epitaxial PtSe(2) nanolayer on Pt(111)
title_fullStr Phase transition and thermal stability of epitaxial PtSe(2) nanolayer on Pt(111)
title_full_unstemmed Phase transition and thermal stability of epitaxial PtSe(2) nanolayer on Pt(111)
title_short Phase transition and thermal stability of epitaxial PtSe(2) nanolayer on Pt(111)
title_sort phase transition and thermal stability of epitaxial ptse(2) nanolayer on pt(111)
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9056341/
https://www.ncbi.nlm.nih.gov/pubmed/35516062
http://dx.doi.org/10.1039/d0ra04346j
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