Evaluation of the change in the morphology of gold nanoparticles during sintering

Koichi Nakaso, Manabu Shimada, Kikuo Okuyama, Knut Deppert

Research output: Contribution to journalArticle

88 Citations (Scopus)

Abstract

Morphological changes of agglomerates consisting of nanometer primary gold particles were studied experimentally and theoretically. Gold aerosol nanoparticles were produced using the evaporation/condensation method, and the change in agglomerate size by reheating was examined experimentally using a tandem DMA setup. Numerical calculations, based on two extreme mechanisms to reshape agglomerates, i.e., subsequent coalescence of primary particles and subsequent rearrangement of primary particles, were carried out. By comparison with the experimental results, the sintering time and the rate constant of restructuring were obtained. Using these values, the change in particle size for different generation conditions could be calculated. The change in morphology of agglomerates can be explained from the comparison of the experimental results with the theoretical calculations: agglomerates with smaller primary particles will compact mainly by the subsequent coalescence of primary particles, while agglomerates with larger primary particles will compact mainly by a rearrangement of primary particles.

Original languageEnglish
Pages (from-to)1061-1074
Number of pages14
JournalJournal of Aerosol Science
Volume33
Issue number7
DOIs
Publication statusPublished - 2002
Externally publishedYes

Fingerprint

Gold
Particles (particulate matter)
Sintering
gold
Nanoparticles
Coalescence
Dynamic mechanical analysis
Aerosols
coalescence
Condensation
Rate constants
Evaporation
Particle size
evaluation
nanoparticle
sintering
particle
condensation
evaporation
particle size

Keywords

  • Agglomerate
  • Evaporation/condensation method
  • Gold
  • Morphology change
  • Nanoparticle
  • Primary particle
  • Sintering

ASJC Scopus subject areas

  • Atmospheric Science
  • Environmental Science(all)

Cite this

Evaluation of the change in the morphology of gold nanoparticles during sintering. / Nakaso, Koichi; Shimada, Manabu; Okuyama, Kikuo; Deppert, Knut.

In: Journal of Aerosol Science, Vol. 33, No. 7, 2002, p. 1061-1074.

Research output: Contribution to journalArticle

Nakaso, Koichi ; Shimada, Manabu ; Okuyama, Kikuo ; Deppert, Knut. / Evaluation of the change in the morphology of gold nanoparticles during sintering. In: Journal of Aerosol Science. 2002 ; Vol. 33, No. 7. pp. 1061-1074.
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