Modelling of Reaction of Metallic Nanospheres with Gas

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F11%3A00363674" target="_blank" >RIV/68081723:_____/11:00363674 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.4028/www.scientific.net/SSP.172-174.1028" target="_blank" >http://dx.doi.org/10.4028/www.scientific.net/SSP.172-174.1028</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/SSP.172-174.1028" target="_blank" >10.4028/www.scientific.net/SSP.172-174.1028</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Modelling of Reaction of Metallic Nanospheres with Gas

Popis výsledku v původním jazyce

The stoichiometric MpXq hollow nanospheres are produced by reaction of metallic M nanospheres with the gaseous X phase. In the first stage a sufficiently thick MpXq nanoshell on the metallic core of phase M is formed. During this stage high supersaturation of vacancies in the M core or very high hydrostatic stress in the M core, due to the misfit between the core and the nanoshell, are developed and provide favourable conditions for the hollow nucleation. The misfit is caused by the Kirkendall effect. Based on the application of the thermodynamic extremal principle a kinetic model of MpXq nanoshell formation is derived. The kinetics is driven by the change of the chemical energy due to reaction of M and X components, of the interface and surface energies, and of the elastic strain energy due to misfit strain of the whole system. The model is used for simulation of the Cu2O shell growth kinetics due to oxidation of a Cu nanosphere, and the results of simulations are discussed.

Název v anglickém jazyce

Modelling of Reaction of Metallic Nanospheres with Gas

Popis výsledku anglicky

The stoichiometric MpXq hollow nanospheres are produced by reaction of metallic M nanospheres with the gaseous X phase. In the first stage a sufficiently thick MpXq nanoshell on the metallic core of phase M is formed. During this stage high supersaturation of vacancies in the M core or very high hydrostatic stress in the M core, due to the misfit between the core and the nanoshell, are developed and provide favourable conditions for the hollow nucleation. The misfit is caused by the Kirkendall effect. Based on the application of the thermodynamic extremal principle a kinetic model of MpXq nanoshell formation is derived. The kinetics is driven by the change of the chemical energy due to reaction of M and X components, of the interface and surface energies, and of the elastic strain energy due to misfit strain of the whole system. The model is used for simulation of the Cu2O shell growth kinetics due to oxidation of a Cu nanosphere, and the results of simulations are discussed.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BJ - Termodynamika

OECD FORD obor

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Projekt

<a href="/cs/project/GAP108%2F10%2F1781" target="_blank" >GAP108/10/1781: Role napěťového stavu a přesycení vakancemi při tvorbě binárních dutých nanočástic</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Solid State Phenomena

ISSN

1012-0394

e-ISSN

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Svazek periodika

172-174

Číslo periodika v rámci svazku

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Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

10

Strana od-do

1028-1037

Kód UT WoS článku

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EID výsledku v databázi Scopus

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