Uniform circular disks with synthetically tailorable diameters: Two-dimensional nanoparticles for plasmonics

Matthew N. O'Brien, Matthew R. Jones, Kevin L. Kohlstedt, George C. Schatz, Chad A. Mirkin

Research output: Contribution to journalArticle

57 Citations (Scopus)


Herein, we report the synthesis of structurally uniform gold circular disks as two-dimensional plasmonic nanostructures that complement the well-established one-dimensional rod and three-dimensional shell structures. We show that a Au conproportionation reaction can be used to etch a collection of nonuniform triangular prisms into a uniform circular disk product with thickness and diameter varying <10%. These new particles have broadly tunable plasmon resonances (650-1000 nm) with narrow bandwidths (0.23-0.28 eV) and can be described as "effectively two-dimensional" plasmonic structures, as they do not support a significant transverse mode.

Original languageEnglish
Pages (from-to)1012-1017
Number of pages6
JournalNano letters
Issue number2
Publication statusPublished - Feb 11 2015



  • Nanoparticle
  • anisotropic
  • circular disk
  • nanoplate
  • noble metal
  • plasmonics
  • triangular prism

ASJC Scopus subject areas

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

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