Xia, Yu, Nelli, Diana, Ferrando, Riccardo et al. (2 more authors) (2021) Shape control of size-selected naked platinum nanocrystals. Nature Communications. p. 3019. ISSN 2041-1723
Abstract
Controlled growth of far-from-equilibrium-shaped nanoparticles with size selection is essential for the exploration of their unique physical and chemical properties. Shape control by wet-chemistry preparation methods produces surfactant-covered surfaces with limited understanding due to the complexity of the processes involved. Here, we report the controlled production and transformation of octahedra to tetrahedra of size-selected platinum nanocrystals with clean surfaces in an inert gas environment. Molecular dynamics simulations of the growth reveal the key symmetry-breaking atomic mechanism for this autocatalytic shape transformation, confirming the experimental conditions required. In-situ heating experiments demonstrate the relative stability of both octahedral and tetrahedral Pt nanocrystals at least up to 700 °C and that the extended surface diffusion at higher temperature transforms the nanocrystals into equilibrium shape.
Metadata
Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021, The Author(s). | ||||
Dates: |
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Institution: | The University of York | ||||
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) | ||||
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Depositing User: | Pure (York) | ||||
Date Deposited: | 17 Jun 2021 16:20 | ||||
Last Modified: | 05 Feb 2024 00:40 | ||||
Published Version: | https://doi.org/10.1038/s41467-021-23305-7 | ||||
Status: | Published | ||||
Refereed: | Yes | ||||
Identification Number: | https://doi.org/10.1038/s41467-021-23305-7 |