Synthesis, linear extinction, and preliminary resonant hyper-Rayleigh scattering studies of gold-core/silver-shell nanoparticles: Comparisons of theory and experiment

Youngjin Kim, Robert C. Johnson, Jiangtian Li, Joseph T Hupp, George C Schatz

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

Gold-core/silver-shell nanoparticles featuring core diameters of 13 or 25 nm were prepared in aqueous solution. Silver-coated gold nanoparticles have two distinct plasmon absorption bands whose relative intensities depend on the shell thickness - features that are captured well by classical Mie theory. The core/shell spectra are not simply linear combinations of the pure-component spectra. Theory shows that shell dielectric effects upon the core can cause broadening, shifting, and, in some cases, damping of dominant extinction spectral features. Preliminary studies show that core-shell particles are reasonably efficient hyper-Rayleigh scatterers under conditions of two-photon resonance or near resonance with a high-energy plasmon band.

Original languageEnglish
Pages (from-to)421-428
Number of pages8
JournalChemical Physics Letters
Volume352
Issue number5-6
DOIs
Publication statusPublished - Feb 6 2002

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Rayleigh scattering
Silver
Gold
extinction
silver
gold
Nanoparticles
nanoparticles
synthesis
Absorption spectra
Photons
Damping
Experiments
Mie scattering
damping
aqueous solutions
absorption spectra
causes
photons
scattering

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

Cite this

Synthesis, linear extinction, and preliminary resonant hyper-Rayleigh scattering studies of gold-core/silver-shell nanoparticles : Comparisons of theory and experiment. / Kim, Youngjin; Johnson, Robert C.; Li, Jiangtian; Hupp, Joseph T; Schatz, George C.

In: Chemical Physics Letters, Vol. 352, No. 5-6, 06.02.2002, p. 421-428.

Research output: Contribution to journalArticle

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