Controlling the agglomeration of anisotropic Ru nanoparticles by the microwave-polyol process

  • R. Harpeness
  • , Zhao Peng
  • , Xiansong Liu
  • , Vilas G. Pol
  • , Yuri Koltypin
  • , Aharon Gedanken

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

A rapid polyol process for the synthesis of ruthenium nanoparticles was developed using microwave irradiation. A colloidal solution of monodispersed anisotropic Ru metal nanoparticles (mean particle size 2-6 nm) with different aspect ratios was obtained first. Particles with different degrees of agglomeration have also been synthesized using monodisperse particles as seeds and PVP (poly-N-vinyl-2-pyrrolidone) as the stabilization reagent. The stabilization mechanisms of different protective reagents were studied by UV-vis spectra. The HRTEM images indicated that dendritic particles formed by controlling agglomeration consisted of single-crystal domains with a random crystalline orientation.

Original languageEnglish
Pages (from-to)678-684
Number of pages7
JournalJournal of Colloid and Interface Science
Volume287
Issue number2
DOIs
StatePublished - 15 Jul 2005

Keywords

  • Anisotropic
  • Microwave irradiation
  • Nanoparticles
  • Polyol process
  • Ruthenium
  • Stabilization reagent

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