Synthesis and characterization of novel Au(core)-Au/Pt alloy(shell) nanostructure

Ru Shi Liu, Hau Ming Chen, Shu Fen Hu

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

A systematic study is reported about the amount-dependent morphology change in a series of Au-Pt bimetallic nanoparticles synthesized using chemical reduction. The amount of Au precursor is kept constant throughout whole series of compounds to obtain fixed Au core size (∼7.5 nm). The Au/Pt ratio is varied from 1/1 to 1/4 in order to synthesize Pt shell layer of different thickness. We observed a remarkable shift of surface plasmon band around 410 nm. With the aid of high resolution transmission electron microscope (HRTEM) and energy-dispersive spectrometer (EDS), the composition of shell layer is found to be Pt enriched Au-Pt alloy. As the amount of Pt increases, the Pt clusters formed a string-like shape on the surface of nanoparticles. The average diameter of these Pt clusters is about 2 nm. This special structure may exhibit unique catalytic property.

Original languageEnglish
Pages (from-to)163-168
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Volume818
Publication statusPublished - 2004 Dec 1
EventNanoparticles and Nanowire Building Blocks - Synthesis, Processing, Characterization and Theory - San Francisco, CA, United States
Duration: 2004 Apr 132004 Apr 16

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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