Kinetic analysis of the instability of hollow nanoparticles

A. M. Gusak; T. V. Zaporozhets; K. N. Tu; U. Gösele

doi:10.1080/14786430500311741

Kinetic analysis of the instability of hollow nanoparticles

A. M. Gusak
, T. V. Zaporozhets
, K. N. Tu
, U. Gösele

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

76 Citations (Scopus)

Abstract

A general method of obtaining hollow nanoparticles by utilizing the Kirkendall effect has been reported recently. We examine here the thermal instability of hollow nanoparticles. The difference of vacancy concentrations at the inner and outer surfaces of a nanoshell will generate an outflux of vacancies and transform it into a solid nanoparticle. Phenomenological as well as kinetic Monte Carlo modeling has been applied to analyse the shrinking kinetics of nanoshells, consisting of either a pure element or an intermetallic compound with large difference of partial diffusivities of the components. Shrinking kinetics and time to collapse to solid particles are demonstrated to be determined mainly by the slow diffusant, making compound nanoshells more stable than anticipated.

Original language	English
Pages (from-to)	4445-4464
Journal	Philosophical Magazine
Volume	85
Issue number	36
DOIs	https://doi.org/10.1080/14786430500311741
Publication status	Published - 21 Dec 2005
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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title = "Kinetic analysis of the instability of hollow nanoparticles",

abstract = "A general method of obtaining hollow nanoparticles by utilizing the Kirkendall effect has been reported recently. We examine here the thermal instability of hollow nanoparticles. The difference of vacancy concentrations at the inner and outer surfaces of a nanoshell will generate an outflux of vacancies and transform it into a solid nanoparticle. Phenomenological as well as kinetic Monte Carlo modeling has been applied to analyse the shrinking kinetics of nanoshells, consisting of either a pure element or an intermetallic compound with large difference of partial diffusivities of the components. Shrinking kinetics and time to collapse to solid particles are demonstrated to be determined mainly by the slow diffusant, making compound nanoshells more stable than anticipated.",

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AU - Gusak, A. M.

AU - Zaporozhets, T. V.

AU - Tu, K. N.

AU - Gösele, U.

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N2 - A general method of obtaining hollow nanoparticles by utilizing the Kirkendall effect has been reported recently. We examine here the thermal instability of hollow nanoparticles. The difference of vacancy concentrations at the inner and outer surfaces of a nanoshell will generate an outflux of vacancies and transform it into a solid nanoparticle. Phenomenological as well as kinetic Monte Carlo modeling has been applied to analyse the shrinking kinetics of nanoshells, consisting of either a pure element or an intermetallic compound with large difference of partial diffusivities of the components. Shrinking kinetics and time to collapse to solid particles are demonstrated to be determined mainly by the slow diffusant, making compound nanoshells more stable than anticipated.

AB - A general method of obtaining hollow nanoparticles by utilizing the Kirkendall effect has been reported recently. We examine here the thermal instability of hollow nanoparticles. The difference of vacancy concentrations at the inner and outer surfaces of a nanoshell will generate an outflux of vacancies and transform it into a solid nanoparticle. Phenomenological as well as kinetic Monte Carlo modeling has been applied to analyse the shrinking kinetics of nanoshells, consisting of either a pure element or an intermetallic compound with large difference of partial diffusivities of the components. Shrinking kinetics and time to collapse to solid particles are demonstrated to be determined mainly by the slow diffusant, making compound nanoshells more stable than anticipated.

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VL - 85

SP - 4445

EP - 4464

JO - Philosophical Magazine

JF - Philosophical Magazine

IS - 36

ER -

Kinetic analysis of the instability of hollow nanoparticles

Abstract

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