Academic Journal
Dynamics of Gold Droplet Formation on SiO 2 /Si(111) Surface
| Title: | Dynamics of Gold Droplet Formation on SiO 2 /Si(111) Surface |
|---|---|
| Authors: | Hijazi, Hadi, Leroy, Frédéric, Monier, Guillaume, Grégoire, Gabin, Gil, Evelyne, Trassoudaine, Agnès, Dubrovskii, Vladimir, Castelluci, Dominique, Goktas, Nebile, Lapierre, Ray, André, Yamina, Robert-Goumet, Christine |
| Contributors: | Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS), ITMO University Russia, Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Mac Master University, CPER MMASYF AURA16-mIDEX-0001 CAP 20-25ANR-10-LABX-1601 LabEx IMobS3Russian Science FoundationFEDER, CPER MMASYF AURA, 16-mIDEX-0001 CAP 20-25, ANR-10-LABX-0016 LabEx IMobS3, Russian Science Foundation, FEDER, ANR-16-IDEX-0001,CAP 20-25,CAP 20-25(2016), ANR-10-LABX-0016,IMoBS3,Innovative Mobility : Smart and Sustainable Solutions(2010), European Project: FEDER |
| Superior Title: | ISSN: 1932-7447. |
| Publisher Information: | HAL CCSD American Chemical Society |
| Publication Year: | 2020 |
| Collection: | Aix-Marseille Université: HAL |
| Subject Terms: | Oxides, Liquids, Gold, Layers, Deposition, [PHYS]Physics [physics], [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] |
| Description: | International audience ; Au droplets are used as a catalyst for the growth of nanowires on Si(111) substrate via the vapor-liquid-solid (VLS) mechanism. The dewetting of a Au thin film is the most common method to obtain these droplets. The control of this step is crucial to adjust the density and the diameter of the nanowires during VLS growth. When the Si(111) substrate is covered with a silicon dioxide layer, the kinetics of Au droplet formation is strongly modified. The dependence of the diameter and spatial distribution of the droplets on the surface have been studied by scanning electron microscopy with respect to the thickness of the silicon dioxide layer, the thickness of the Au film and the temperature of the substrate during deposition and post-deposition annealing. In-situ low energy electron microscopy and low energy electron diffraction revealed the dynamics of the Au droplet formation after annealing. The Au droplets are shown to catalyze the decomposition of silicon dioxide at high temperature (> 650-700 °C) and form a wetting layer of Au-(33)-Si(111). Consequently, the droplets absorb silicon atoms from the substrate, migrate perpendicular to the atomic steps and grow by the Smoluchowski ripening process. |
| Document Type: | article in journal/newspaper |
| Language: | English |
| Relation: | hal-02992036; https://uca.hal.science/hal-02992036; https://uca.hal.science/hal-02992036/document; https://uca.hal.science/hal-02992036/file/Dynamics%20of%20Au%20droplet%20formation%20on%20SiO2Si%28111%29%20surface.pdf |
| DOI: | 10.1021/acs.jpcc.0c02378 |
| Availability: | https://doi.org/10.1021/acs.jpcc.0c02378 https://uca.hal.science/hal-02992036 https://uca.hal.science/hal-02992036/document https://uca.hal.science/hal-02992036/file/Dynamics%20of%20Au%20droplet%20formation%20on%20SiO2Si%28111%29%20surface.pdf |
| Rights: | info:eu-repo/semantics/OpenAccess |
| Accession Number: | edsbas.B97F7914 |
| Database: | BASE |
| Description not available. |