PEI-assisted preparation of Au nanoparticles via reductive crystallization process

Takashi Mikami*, Yuta Takayasu, Izumi Hirasawa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


Nano-sized gold particles were prepared in a solution containing polyethylenimine (PEI) utilizing a batch reactor. PEI acts as a reducing agent as well as a stabilizing agent of nanoparticles. The effects of initial concentration of PEI on the mean particle diameter, coefficient of variation (C.V.), growth rate, nucleation rate and the number of nuclei were studied. The particle diameter of gold decreased markedly with increasing initial concentration of PEI, from 3.3 μm to a minimum value of about 5 nm. The observed decrease of particle diameter was considered to be caused by the growth-inhibiting effect of PEI, which affects the conclusive number of nuclei.

Original languageEnglish
Pages (from-to)1248-1251
Number of pages4
JournalChemical Engineering Research and Design
Issue number9
Publication statusPublished - 2010 Sept 1


  • Nanoparticles
  • Polyelectrolyte additive
  • Reductive crystallization

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)


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