Morphology and surface plasma changes of Au-Pt bimetallic nanoparticles

Hao Ming Chen, Hsin Chieh Peng, Ru Shi Liu, Shu Fen Hu, Hwo Shuenn Sheu

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In this study, we examined the amount-dependent change in morphology in a series of Au-Pt bimetallic nanoparticles synthesized using chemical reduction. The amount of Au precursor was kept constant throughout the experiment. The Au/Pt molar ratio was varied from 1/1 to 1/4 to synthesize Pt shell layers with different thicknesses. We observed a remarkable shift of the surface plasmon band at around 410 nm. By high-resolution transmission electron microscopy (HRTEM) and energy-dispersive spectrometry (EDS), the composition of the shell layer was found to be Pt-enriched Au-Pt alloy. As the concentration of Pt increases, Pt clusters (ca. 1.8 nm in diameter) form a string-like shape on the surface of nanoparticles.

Original languageEnglish
Pages (from-to)1411-1415
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume6
Issue number5
DOIs
Publication statusPublished - 2006 May 1

Keywords

  • Au/Pt
  • Bimetallic
  • Core-Shell
  • Nanoparticles

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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