Temperature-dependent formation and shrinkage of hollow shells in hemispherical Ag/Pd nanoparticles

Gyrgyi Glodán, C. Cserháti, D. Beke

Research output: Article

10 Citations (Scopus)

Abstract

It is shown that both the growth and shrinkage of hollow shells in Ag/Pd hemispherical core-shell nanostructures take place at the same temperature. The crossover time, t cr, between these regimes is shifted to lower values with increasing temperature. This result confirms that the growth and shrinkage regimes are controlled by the faster and slower diffusion coefficients (D Ag and Ds Pd), respectively. The pore radius, confirming recent theoretical predictions, linearly depends on the initial particle radius, and the slope of this straight line increases with the average composition of the faster component.

Original languageEnglish
Pages (from-to)3806-3812
Number of pages7
JournalPhilosophical Magazine
Volume92
Issue number31
DOIs
Publication statusPublished - nov. 1 2012

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shrinkage
hollow
nanoparticles
radii
crossovers
diffusion coefficient
slopes
porosity
temperature
predictions

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

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abstract = "It is shown that both the growth and shrinkage of hollow shells in Ag/Pd hemispherical core-shell nanostructures take place at the same temperature. The crossover time, t cr, between these regimes is shifted to lower values with increasing temperature. This result confirms that the growth and shrinkage regimes are controlled by the faster and slower diffusion coefficients (D Ag and Ds Pd), respectively. The pore radius, confirming recent theoretical predictions, linearly depends on the initial particle radius, and the slope of this straight line increases with the average composition of the faster component.",
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AU - Glodán, Gyrgyi

AU - Cserháti, C.

AU - Beke, D.

PY - 2012/11/1

Y1 - 2012/11/1

N2 - It is shown that both the growth and shrinkage of hollow shells in Ag/Pd hemispherical core-shell nanostructures take place at the same temperature. The crossover time, t cr, between these regimes is shifted to lower values with increasing temperature. This result confirms that the growth and shrinkage regimes are controlled by the faster and slower diffusion coefficients (D Ag and Ds Pd), respectively. The pore radius, confirming recent theoretical predictions, linearly depends on the initial particle radius, and the slope of this straight line increases with the average composition of the faster component.

AB - It is shown that both the growth and shrinkage of hollow shells in Ag/Pd hemispherical core-shell nanostructures take place at the same temperature. The crossover time, t cr, between these regimes is shifted to lower values with increasing temperature. This result confirms that the growth and shrinkage regimes are controlled by the faster and slower diffusion coefficients (D Ag and Ds Pd), respectively. The pore radius, confirming recent theoretical predictions, linearly depends on the initial particle radius, and the slope of this straight line increases with the average composition of the faster component.

KW - hollow nanostructures

KW - interdiffusion

KW - Kirkendall effect

KW - stability

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JO - Philosophical Magazine

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