Centrifugal shape sorting and optical response of polyhedral gold nanoparticles

Yu Jin Shin, Emilie Ringe, Michelle L. Personick, M. Fernanda Cardinal, Chad A. Mirkin, Laurence D. Marks, Richard P. Van Duyne, Mark C. Hersam

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

A centrifugal route for separating small {110}-faceted gold nanostructures, namely rhombic dodecahedra (RD) and triangular bipyramids (BPs), which form simultaneously during synthesis and cannot be separated by means of conventional filtration methods, is presented. The centrifuged solution shows two distinct bands: i) RD and ii) BPs, as verified in the corresponding scanning electron microscopy images. The sorted BPs show a refractive index dependence 2.5 times that of the as-synthesized, unsorted mixture.

Original languageEnglish
Pages (from-to)4023-4027
Number of pages5
JournalAdvanced Materials
Volume25
Issue number29
DOIs
Publication statusPublished - Aug 7 2013

Keywords

  • bipyramids
  • density gradient centrifugation
  • gold nanoparticles
  • localized surface plasmon resonance
  • refractive index sensing
  • rhombic dodecahedra

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Shin, Y. J., Ringe, E., Personick, M. L., Cardinal, M. F., Mirkin, C. A., Marks, L. D., Van Duyne, R. P., & Hersam, M. C. (2013). Centrifugal shape sorting and optical response of polyhedral gold nanoparticles. Advanced Materials, 25(29), 4023-4027. https://doi.org/10.1002/adma.201301278