Fabrication of gold-platinum nanoalloy by high-intensity laser irradiation of solution

Takahiro Nakamura, Yuliati Herbani, Shunichi Sato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Gold-platinum (Au-Pt) solid solution nanoalloys were fabricated by high-intensity femtosecond laser irradiation of mixed solution of auric and platinum ions. Photo-absorption spectra of prepared solutions were measured by UV-visible spectrophotometer before and after irradiation. The fabricated particles were characterized by TEM and XRD. While two representative diffraction peaks are commonly observed between peak the positions of pure bulk gold and platinum for bulk because of a large immiscibility gap in a Au-Pt binary system, only a single diffraction peak was detected for single-nanometer sized Au-Pt nanoalloy particles fabricated by high-intensity laser irradiation of mixed solution of auric and platinum ions with the concentration of 5.0×10-4 M. This finding demonstrates that solid solution Au-Pt nanoalloys are successfully fabricated only by high-intensity laser irradiation of aqueous solution without any chemicals.

Original languageEnglish
Title of host publicationTMS 2011 - 140th Annual Meeting and Exhibition, Supplemental Proceedings
Pages3-8
Number of pages6
Volume2
Publication statusPublished - 2011 Jul 27
EventTMS 2011 - 140th Annual Meeting and Exhibition - San Diego, CA, United States
Duration: 2011 Feb 272011 Mar 3

Other

OtherTMS 2011 - 140th Annual Meeting and Exhibition
CountryUnited States
CitySan Diego, CA
Period11/2/2711/3/3

Keywords

  • Au-Pt nanoalloy
  • Femtosecond laser
  • Liquid

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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