Femtosecond laser synthesis of bimetallic Pt-Au nanoparticles

Joseph Lik Hang Chau, Chun Yen Chen, Min Chieh Yang, Kwang Lung Lin, Shunichi Sato, Takahiro Nakamura, Chih Chao Yang, Chung Wei Cheng

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


Bimetallic Pt-Au nanoparticles were successfully synthesized by irradiating the metal precursor solution with high intensity femtosecond laser. The intense optical field created by femtosecond laser pulse induced the production of highly charged ions and molecules due to the optical decomposition of metal precursor molecules. Further collisions with molecules result in subsequent growth of the nuclei and codeposition of Pt and Au atoms on the nuclei to form the larger ones. The method is a simple, easy-to-control and environmentally benign process. The average size and morphology of bimetallic nanoparticles were examined by transmission electron microscope. The compositional distributions of Pt and Au of individual Pt-Au nanoparticles were examined by X-ray energy dispersive spectroscopy (EDS).

Original languageEnglish
Pages (from-to)804-807
Number of pages4
JournalMaterials Letters
Issue number4
Publication statusPublished - 2011 Feb 28


  • Electron microscopy
  • Laser processing
  • Metals and alloys
  • Nanoparticles


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