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Updated: Jun 24, 2026

Photodeposition of Pd onto Colloidal Au Nanorods by Surface Plasmon Excitation
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Multiple surface plasmon modes for gold/silver alloy nanorods.

Hye-Mi Bok1, Kevin L Shuford, Sungwan Kim

  • 1Department of Chemistry and Department of Energy Science, Sungkyunkwan University, Suwon, South Korea.

Langmuir : the ACS Journal of Surfaces and Colloids
|April 2, 2009
PubMed
Summary

Synthesized gold-silver alloy nanorods exhibit tunable optical properties. Their localized surface plasmon resonance (LSPR) modes shift predictably with changes in gold and silver composition, offering potential for new optical applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optical Physics

Background:

  • Bimetallic alloy nanostructures offer unique optical properties.
  • Controlling composition is key to tuning these properties.
  • Anodized aluminum oxide templates provide a versatile platform for nanorod synthesis.

Purpose of the Study:

  • To synthesize gold-silver (Au/Ag) alloy nanorods.
  • To investigate the effect of varying Au/Ag composition on localized surface plasmon resonance (LSPR) modes.
  • To compare experimental LSPR data with theoretical calculations.

Main Methods:

  • Electrochemical codeposition of Au/Ag alloy into anodized aluminum oxide templates.
  • Characterization of LSPR modes as a function of alloy composition and nanorod length.

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Last Updated: Jun 24, 2026

Photodeposition of Pd onto Colloidal Au Nanorods by Surface Plasmon Excitation
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Published on: December 11, 2013

  • Optical property calculations using discrete dipole approximation (DDA).

    • Main Results:

    • Au/Ag alloy nanorods were successfully synthesized.
    • Transverse LSPR modes blue-shifted with increasing silver content.
    • Multiple longitudinal LSPR modes were observed for nanorods longer than 300 nm.
    • DDA calculations showed good agreement with experimental LSPR measurements.

    Conclusions:

    • The composition of Au/Ag alloy nanorods significantly influences their LSPR properties.
    • Length-dependent LSPR modes, including multiple longitudinal modes, were observed.
    • The study validates DDA as a reliable method for predicting optical properties of such nanostructures.