Optical properties of Au-Ag nanoboxes studied by single nanoparticle spectroscopy

Min Hu, Hristina Petrova, Andrew R. Sekkinen, Jingyi Chen, Joseph M. McLellan, Zhi Yuan Li, Manuel Marquez, Xingde Li, Younan Xia, Gregory V. Hartland

Research output: Contribution to journalArticlepeer-review

77 Scopus citations


The optical properties of two Au-Ag nanobox samples with average edge lengths of 44 and 58 nm and wall thicknesses of 6 and 8 nm, respectively, have been studied by single particle spectroscopy. The measurements gave an average line width of Γ̄ = 306 ± 7 meV with a standard deviation of σ = 30 meV for the 44-nm boxes, and F = 350 ± 9 meV with σ = 35 meV for the 58-nm boxes. These line widths are much broader than those of gold nanorods with comparable resonance energies. The increased broadening is attributed to a combination of surface scattering of electrons, as well as increased radiation damping for the nanoboxes. Discrete dipole approximation calculations have been performed with and without surface scattering of electrons to compare with the experimental spectra. The calculations confirm that both electron-surface scattering and radiation damping are important effects in this system.

Original languageEnglish (US)
Pages (from-to)19923-19928
Number of pages6
JournalJournal of Physical Chemistry B
Issue number40
StatePublished - Oct 12 2006
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry


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