Formation mechanism of nanostructured Ag films from Ag2O particles using a sonoprocess

Masahiro Inoue, Yamato Hayashi, Hirotsugu Takizawa, Katsuaki Suganuma

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Nanostructured Ag films composed of nanoparticles and nanorods can be formed by the ultrasonication of ethanol solutions containing Ag2O particles. The present work examined the formation process of these films from ethanol solutions by two different agitation methods, including ultrasonication and mechanical stirring. The mass-transfer process from Ag2O particles to ethanol solvent is accelerated by the mechanical effects of ultrasound. Ag+ ions and intermediately reduced Ag clusters were released into the ethanol. These Ag+ ions and Ag clusters provide absorption bands at 210, 275 and 300 nm in UV-vis spectra. These bands were assigned to the absorption of Ag+, Ag42+ and Agn (n≈3). The Agn clusters that readily grow to become Ag nanoparticles were formed due to the surface reaction of Ag2O particles with ethanol under ultrasonication. The reactions of Ag+ ions in ethanol to form Ag nanomaterials (through the formation of Ag 42+ clusters) were also accelerated by ultrasonication.

Original languageEnglish
Pages (from-to)1061-1069
Number of pages9
JournalColloid and Polymer Science
Issue number10-11
Publication statusPublished - 2010 Jul


  • Chemical synthesis
  • Nanostructured films
  • Reaction mechanism
  • Ultrasonication

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Colloid and Surface Chemistry
  • Materials Chemistry


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