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Related Experiment Video

Updated: May 24, 2026

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
15:06

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

Measuring the range of plasmonic interaction.

Mareike Kiel1, Madlen Klötzer, Steffen Mitzscherling

  • 1Institute of Physics and Astronomy, University of Potsdam, Potsdam, Germany.

Langmuir : the ACS Journal of Surfaces and Colloids
|February 29, 2012
PubMed
Summary

Covering gold nanoparticles with polyelectrolyte layers significantly alters their plasmon absorption and reflection spectra. These spectral changes are layer-thickness dependent and limited by particle size, impacting effective medium theory applications.

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Physical Chemistry

Background:

  • Gold nanoparticles exhibit unique plasmonic properties.
  • Polyelectrolyte coatings can modify nanoparticle optical behavior.

Purpose of the Study:

  • Investigate the effect of polyelectrolyte layer thickness on gold nanoparticle plasmon spectra.
  • Analyze spectral shifts in interacting nanoparticle layers.
  • Evaluate the applicability of effective medium theory.

Main Methods:

  • Fabrication of gold nanoparticles coated with transparent polyelectrolytes.
  • Spectroscopic analysis of absorption and reflection spectra.
  • Theoretical modeling using effective medium theory.

Main Results:

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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

Published on: July 21, 2018

Performing Spectroscopy on Plasmonic Nanoparticles with Transmission-Based Nomarski-Type Differential Interference Contrast Microscopy
08:54

Performing Spectroscopy on Plasmonic Nanoparticles with Transmission-Based Nomarski-Type Differential Interference Contrast Microscopy

Published on: June 5, 2019

Related Experiment Videos

Last Updated: May 24, 2026

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
15:06

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
07:39

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

Published on: July 21, 2018

Performing Spectroscopy on Plasmonic Nanoparticles with Transmission-Based Nomarski-Type Differential Interference Contrast Microscopy
08:54

Performing Spectroscopy on Plasmonic Nanoparticles with Transmission-Based Nomarski-Type Differential Interference Contrast Microscopy

Published on: June 5, 2019

  • Plasmon absorption increased ~3x and red-shifted with nanometric polyelectrolyte layers.
  • Spectral modifications saturated when layer thickness approached particle diameter.
  • Reflection spectra continued to change with increasing layer thickness.
  • Plasmon resonance shift in interacting layers was studied against separation distance.

Conclusions:

  • Effective medium theory is applicable only for layer thicknesses comparable to particle diameter.
  • Polyelectrolyte coating thickness critically influences nanoparticle plasmonic response.