Erhart, P. ; Albe, K. (2005)
Molecular dynamics simulations of gas phase condensation of silicon carbide nanoparticles.
In: Adv. Eng. Mat., 7 (10)
doi: 10.1002/adem.200500119
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Gas phase condensation of silicon and silicon carbide nanoparticles is studied by molecular-dynamics simulations. By using a recently developed bond-order potential for Si, C and SiC we investigate the fundamental processes governing nucleation and growth of SiC nanoparticles. For the case of elemental silicon particles we show that variations in the binding energy of dimers, which represent stable nuclei for the condensation process, significantly affect the long time evolution of the cluster formation process. A detailed analysis of the molecular reactions during the early stages of SiC particle growth is presented. Reactions, in which silicon monomers are formed, are dominant in case of stoichiometric composition of the precursor gas. Moreover, we find the formation of carbon-dominated species to be preferred and a sensitive dependence of the particle composition and morphology on the processing conditions, especially the cooling and precursor gas composition.
| Typ des Eintrags: | Artikel | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Erschienen: | 2005 | ||||||||
| Autor(en): | Erhart, P. ; Albe, K. | ||||||||
| Art des Eintrags: | Bibliographie | ||||||||
| Titel: | Molecular dynamics simulations of gas phase condensation of silicon carbide nanoparticles | ||||||||
| Sprache: | Englisch | ||||||||
| Publikationsjahr: | Oktober 2005 | ||||||||
| Verlag: | WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim | ||||||||
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Adv. Eng. Mat. | ||||||||
| Jahrgang/Volume einer Zeitschrift: | 7 | ||||||||
| (Heft-)Nummer: | 10 | ||||||||
| DOI: | 10.1002/adem.200500119 | ||||||||
| Kurzbeschreibung (Abstract): | Gas phase condensation of silicon and silicon carbide nanoparticles is studied by molecular-dynamics simulations. By using a recently developed bond-order potential for Si, C and SiC we investigate the fundamental processes governing nucleation and growth of SiC nanoparticles. For the case of elemental silicon particles we show that variations in the binding energy of dimers, which represent stable nuclei for the condensation process, significantly affect the long time evolution of the cluster formation process. A detailed analysis of the molecular reactions during the early stages of SiC particle growth is presented. Reactions, in which silicon monomers are formed, are dominant in case of stoichiometric composition of the precursor gas. Moreover, we find the formation of carbon-dominated species to be preferred and a sensitive dependence of the particle composition and morphology on the processing conditions, especially the cooling and precursor gas composition. |
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| Freie Schlagworte: | Molecular dynamics, Nanomaterials, Silicon carbide | ||||||||
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| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung |
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| Hinterlegungsdatum: | 28 Feb 2012 15:25 | ||||||||
| Letzte Änderung: | 30 Aug 2018 13:37 | ||||||||
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| Sponsoren: | Financial support by the German academic exchange service (DAAD) through a bilateral travel program is gratefully acknowledged. | ||||||||
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| Suche nach Titel in: | TUfind oder in Google | ||||||||
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