Fabrication of platinum particles by intense, femtosecond laser pulse irradiation of aqueous solution

Takahiro Nakamura, Kouichi Takasaki, Akihiko Ito, Shunichi Sato

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Platinum nano-particles were directly fabricated through molecular dissociation process induced by tightly focused femtosecond laser pluses in hydrogen hexachloroplatinate (IV) hexahydrate (H 2 PtCl 6 ·6H 2 O) aqueous solution. After irradiation, it was found that UV-visible absorption spectrum of the solution was changed and a large number of small platinum particles were synthesized. The variation of absorbance in the spectrum and the yield the particle synthesis depended on the concentration of the solution. The most effective condition for particle synthesis was 0.1 wt%. Black precipitates of platinum particles were observed in the bottom of the vessel after irradiation in some cases. The dispersibility of the particles was greatly improved by the addition of polyvinylpyrrolidone (PVP) as a dispersant, and no precipitates were found in the solution with 1.0 × 10 -2 wt% PVP. Consequently, highly monodispersed platinum nano-particles with the mean size of about 3 nm were successfully fabricated.

Original languageEnglish
Pages (from-to)9630-9633
Number of pages4
JournalApplied Surface Science
Volume255
Issue number24
DOIs
Publication statusPublished - 2009 Sep 30

Keywords

  • Aqueous solution
  • Femtosecond laser
  • Nano-particle synthesis
  • Platinum

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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