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Title
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The influence of size, shape, and twin boundaries on heat-induced alloying in individual Au@Ag core-shell nanoparticles
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Author
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Abstract
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| Environmental conditions during real-world application of bimetallic core-shell nanoparticles (NPs) often include the use of elevated temperatures, which are known to cause elemental redistribution, in turn significantly altering the properties of these nanomaterials. Therefore, a thorough understanding of such processes is of great importance. The recently developed combination of fast electron tomography with in situ heating holders is a powerful approach to investigate heat-induced processes at the single NP level, with high spatial resolution in 3D. In combination with 3D finite-difference diffusion simulations, this method can be used to disclose the influence of various NP parameters on the diffusion dynamics in Au@Ag core-shell systems. A detailed study of the influence of heating on atomic diffusion and alloying for Au@Ag NPs with varying core morphology and crystallographic details is carried out. Whereas the core shape and aspect ratio of the NPs play a minor role, twin boundaries are found to have a strong influence on the elemental diffusion. |
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Language
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English
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Source (journal)
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Small. - Weinheim
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Publication
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Weinheim
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Wiley-v c h verlag gmbh
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2021
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ISSN
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1613-6810
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DOI
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10.1002/SMLL.202102348
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Volume/pages
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17
:34
(2021)
, 11 p.
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Article Reference
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2102348
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ISI
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000673326600001
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Pubmed ID
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34259397
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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Full text (publisher's version - intranet only)
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