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*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


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 (US)
Pages (from-to)4023-4027
Number of pages5
JournalAdvanced Materials
Issue number29
StatePublished - Aug 7 2013


  • 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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