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Updated: May 24, 2026

Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
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Tunable plasmon coupling in distance-controlled gold nanoparticles.

Holger Lange1, Beatriz H Juárez, Adrian Carl

  • 1Institut für Festkörperphysik, Technische Universität Berlin, Hardenbergstr. 36, 10623, Berlin, Germany. holger.lange@physik.tu-berlin.de

Langmuir : the ACS Journal of Surfaces and Colloids
|March 16, 2012
PubMed
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Researchers demonstrate a novel system using poly(N-isopropylacrylamide) and gold nanoparticles to control plasmon-coupled modes. This breakthrough allows for reversible switching and tuning of these collective excitations in metallic nanostructures.

Area of Science:

  • Nanotechnology
  • Materials Science
  • Plasmonics

Background:

  • Plasmons are collective electron oscillations in metallic nanostructures, crucial for optical properties.
  • Plasmon-coupled modes arise from interactions between closely spaced metallic nanoparticles.

Purpose of the Study:

  • To design a system for controllable and reversible switching of plasmon-coupled modes.
  • To enable tuning of plasmon-coupled modes in a designed nanostructure.

Main Methods:

  • Combining poly(N-isopropylacrylamide) (PNIPAM) micro/nanospheres with gold (Au) nanoparticles.
  • Utilizing the stimuli-responsive properties of PNIPAM to control nanoparticle spacing.

Main Results:

  • Demonstrated the ability to controllably switch plasmon-coupled modes on and off.

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Last Updated: May 24, 2026

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  • Showcased reversible tuning of the plasmon-coupled mode by adjusting nanoparticle proximity.
  • Achieved precise control over collective excitations in the designed system.

    • Conclusions:

    • The developed system offers a new platform for manipulating plasmon coupling.
    • This work provides a method for dynamic control of optical properties in nanophotonics.
    • The reversible switching and tuning capabilities open avenues for advanced optical devices.