Quantitative measurements of individual gold nanoparticle scattering cross sections

Lindsey J.E. Anderson, Kathryn M. Mayer, Robert D. Fraleigh, Yi Yang, Seunghyun Lee, Jason H. Hafner

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Dark field microspectroscopy is a powerful tool for studying plasmon resonances of noble metal nanoparticles and for developing their applications in sensing and imaging. Here we calibrate a dark field microspectrometer with measurements on gold nanospheres in a uniform dielectric medium to yield quantitative spectral scattering cross sections for elongated nanoparticle shapes. Gold bipyramids, 135 nm in length, were found to have a peak differential cross section of 1.2 × 10-16 m2. Measurements of a small ensemble of gold nanorods, 13 nm in diameter and 45 nm in length on average, were found to have a peak differential cross section of only 1 × 10-18 m2. For the smaller gold nanorods, approximate expressions for the total scattering cross section may be used to indicate their scattering signal in microscopy applications.

Original languageEnglish (US)
Pages (from-to)11127-11132
Number of pages6
JournalJournal of Physical Chemistry C
Volume114
Issue number25
DOIs
StatePublished - Jul 1 2010

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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