The influence of anion on the coarsening kinetics of ZnO nanoparticles

Zeshan Hu; Gerko Oskam; R. Lee Penn; Noshir Pesika; Peter C. Searson

doi:10.1021/jp020580h

The influence of anion on the coarsening kinetics of ZnO nanoparticles

Zeshan Hu, Gerko Oskam, R. Lee Penn, Noshir Pesika, Peter C. Searson

Chemistry (Twin Cities)

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144 Scopus citations

Abstract

In solution phase synthesis of nanoparticles, processes such as coarsening and aggregation can compete with nucleation and growth in modifying the particle size distribution in the system. We report on the synthesis of ZnO nanoparticles from Zn(CH₃CO₂)₂, ZnBr₂, and Zn(ClO₄)₂ in 2-propanol. For synthesis from Zn(CH₃-CO₂)₂ and ZnBr₂, nucleation and growth are fast and are followed by diffusion-limited coarsening. For synthesis from Zn(ClO₄)₂, diffusion-limited coarsening is observed at shorter times whereas at longer times the particle size increases more rapidly. The rate constant for coarsening at constant temperature increases in the order Br^- < CH₃CO₂^- < ClO₄^- indicating that the rate is dependent on anion adsorption. The temperature dependence of the rate constant for coarsening is due to the temperature dependence of the solvent viscosity and the temperature dependence of the bulk solubility of ZnO.

Original language	English (US)
Pages (from-to)	3124-3130
Number of pages	7
Journal	Journal of Physical Chemistry B
Volume	107
Issue number	14
DOIs	https://doi.org/10.1021/jp020580h
State	Published - Apr 10 2003

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abstract = "In solution phase synthesis of nanoparticles, processes such as coarsening and aggregation can compete with nucleation and growth in modifying the particle size distribution in the system. We report on the synthesis of ZnO nanoparticles from Zn(CH3CO2)2, ZnBr2, and Zn(ClO4)2 in 2-propanol. For synthesis from Zn(CH3-CO2)2 and ZnBr2, nucleation and growth are fast and are followed by diffusion-limited coarsening. For synthesis from Zn(ClO4)2, diffusion-limited coarsening is observed at shorter times whereas at longer times the particle size increases more rapidly. The rate constant for coarsening at constant temperature increases in the order Br- < CH3CO2- < ClO4- indicating that the rate is dependent on anion adsorption. The temperature dependence of the rate constant for coarsening is due to the temperature dependence of the solvent viscosity and the temperature dependence of the bulk solubility of ZnO.",

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AU - Hu, Zeshan

AU - Oskam, Gerko

AU - Penn, R. Lee

AU - Pesika, Noshir

AU - Searson, Peter C.

PY - 2003/4/10

Y1 - 2003/4/10

N2 - In solution phase synthesis of nanoparticles, processes such as coarsening and aggregation can compete with nucleation and growth in modifying the particle size distribution in the system. We report on the synthesis of ZnO nanoparticles from Zn(CH3CO2)2, ZnBr2, and Zn(ClO4)2 in 2-propanol. For synthesis from Zn(CH3-CO2)2 and ZnBr2, nucleation and growth are fast and are followed by diffusion-limited coarsening. For synthesis from Zn(ClO4)2, diffusion-limited coarsening is observed at shorter times whereas at longer times the particle size increases more rapidly. The rate constant for coarsening at constant temperature increases in the order Br- < CH3CO2- < ClO4- indicating that the rate is dependent on anion adsorption. The temperature dependence of the rate constant for coarsening is due to the temperature dependence of the solvent viscosity and the temperature dependence of the bulk solubility of ZnO.

AB - In solution phase synthesis of nanoparticles, processes such as coarsening and aggregation can compete with nucleation and growth in modifying the particle size distribution in the system. We report on the synthesis of ZnO nanoparticles from Zn(CH3CO2)2, ZnBr2, and Zn(ClO4)2 in 2-propanol. For synthesis from Zn(CH3-CO2)2 and ZnBr2, nucleation and growth are fast and are followed by diffusion-limited coarsening. For synthesis from Zn(ClO4)2, diffusion-limited coarsening is observed at shorter times whereas at longer times the particle size increases more rapidly. The rate constant for coarsening at constant temperature increases in the order Br- < CH3CO2- < ClO4- indicating that the rate is dependent on anion adsorption. The temperature dependence of the rate constant for coarsening is due to the temperature dependence of the solvent viscosity and the temperature dependence of the bulk solubility of ZnO.

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The influence of anion on the coarsening kinetics of ZnO nanoparticles

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