Quantifying the Nucleation and Growth Kinetics of Microwave Nanochemistry Enabled by in Situ High-Energy X-ray Scattering

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • Min-Rui Gao
  • Yuzi Liu
  • John S. Okasinski
  • Yang Ren
  • Yugang Sun

Detail(s)

Original languageEnglish
Pages (from-to)715-720
Journal / PublicationNano Letters
Volume16
Issue number1
Early online date1 Dec 2015
Publication statusPublished - 13 Jan 2016
Externally publishedYes

Abstract

The fast reaction kinetics presented in the microwave synthesis of colloidal silver nanoparticles was quantitatively studied, for the first time, by integrating a microwave reactor with in situ X-ray diffraction at a high-energy synchrotron beamline. Comprehensive data analysis reveals two different types of reaction kinetics corresponding to the nucleation and growth of the Ag nanoparticles. The formation of seeds (nucleation) follows typical first-order reaction kinetics with activation energy of 20.34 kJ/mol, while the growth of seeds (growth) follows typical self-catalytic reaction kinetics. Varying the synthesis conditions indicates that the microwave colloidal chemistry is independent of concentration of surfactant. These discoveries reveal that the microwave synthesis of Ag nanoparticles proceeds with reaction kinetics significantly different from the synthesis present in conventional oil bath heating. The in situ X-ray diffraction technique reported in this work is promising to enable further understanding of crystalline nanomaterials formed through microwave synthesis.

Research Area(s)

  • first-order reaction kinetics, in situ high-energy X-ray diffraction, Microwave nanochemistry, self-catalytic reaction kinetics, silver nanoparticles

Citation Format(s)

Quantifying the Nucleation and Growth Kinetics of Microwave Nanochemistry Enabled by in Situ High-Energy X-ray Scattering. / Liu, Qi; Gao, Min-Rui; Liu, Yuzi; Okasinski, John S.; Ren, Yang; Sun, Yugang.

In: Nano Letters, Vol. 16, No. 1, 13.01.2016, p. 715-720.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review