Synthesis and Optical Properties of "Branched" Gold Nanocrystals

Encai Hao, Ryan C. Bailey, George C. Schatz*, Joseph T. Hupp, Shuyou Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

521 Scopus citations

Abstract

We report the synthesis of new "branched" gold nanocrystals in high yield (over 90%) via a wet-chemical route. The branched nanocrystals exhibit a shape-dependent plasmon resonance that is red-shifted by 130-180 nm from the spherical particle wavelength. Discrete dipole approximation (DDA) calculations qualitatively replicate the observed optical extinction spectra of the nanocrystals, indicating that the surface plasmon resonance is mainly determined by in-plane dipole excitation associated with the sharp tips.

Original languageEnglish (US)
Pages (from-to)327-330
Number of pages4
JournalNano letters
Volume4
Issue number2
DOIs
StatePublished - Feb 1 2004

ASJC Scopus subject areas

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

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