Synthesis, shape control, and optical properties of hybrid Au/Fe 3O4 "nanoflowers"

Yanhu Wei, Rafal Klajn, Anatoliy O. Pinchuk, Bartosz A. Grzybowski

Research output: Contribution to journalArticle

134 Citations (Scopus)

Abstract

A procedure that allows for the preparation of a range of Au/Fe 3O4 hybrid nanoflowers differing in the relative sizes and the numbers of ion oxide domains, was reported. The nanoflower particle were synthesized in a solution of oleylamine in I-octadecene heated to 100°C under argon and AuNP seeds were injected into this solution. High-resolution images of the composite particles confirm that the distance between two adjacent lattice planes in Fe3O4 domains is 4.88 Å, which is consistent with the reported value of 4.85 Å for (111) planes. It is also found that he crystallinity of the Au seeds controls the nucleation, with one iron leaf nucleated per monocrystalline domain of gold. The growth of consecutive leaves is accompanied by the red shift, broadening, and gradual extinction of the Au SPR band in the visible region.

Original languageEnglish
Pages (from-to)1635-1639
Number of pages5
JournalSmall
Volume4
Issue number10
DOIs
Publication statusPublished - Oct 1 2008

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Keywords

  • Asymmetric nanoparticles
  • Gold
  • Iron oxide
  • Plasmonics
  • Shape control

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

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