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Related Experiment Video

Updated: Apr 25, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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Plasmonic library based on substrate-supported gradiential plasmonic arrays.

Mareen B Müller1, Christian Kuttner, Tobias A F König

  • 1Physical Chemistry II, University of Bayreuth , Universitätsstrasse 30, 95447 Bayreuth, Germany.

ACS Nano
|August 20, 2014
PubMed
Summary

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We developed a method to create plasmonic nanoparticle arrays with controlled size gradients. These arrays act as libraries for studying nanoparticle size effects without plasmon coupling.

Area of Science:

  • Nanotechnology
  • Materials Science
  • Plasmonics

Background:

  • Plasmonic nanoparticles exhibit size-dependent optical properties.
  • Controlling nanoparticle size and spacing is crucial for tuning plasmonic behavior.
  • Previous methods often struggle with precise control over large-scale arrays.

Purpose of the Study:

  • To develop a versatile method for producing substrate-supported plasmonic nanoparticle arrays.
  • To create arrays with a continuous particle size gradient and well-defined spacing.
  • To establish a platform for combinatorial screening of nanoparticle size effects.

Main Methods:

  • Substrate assembly of gold-core/poly(N-isopropylacrylamide)-shell particles.
  • Dip-coating in a growth solution for controlled gold core overgrowth.
Keywords:
PNIPAMcore/shell particlesgradient assemblieslocalized surface plasmon resonanceplasmonic libraryscreening substratesurface modification

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  • Tuning particle size by adjusting withdrawal speed during dip-coating.
  • UV-vis extinction spectroscopy to investigate localized surface plasmon resonances (LSPRs).

    • Main Results:

    • Macroscopic, substrate-supported arrays of plasmonic nanoparticles were successfully produced.
    • A continuous particle size gradient with well-defined interparticle spacing was achieved.
    • The overgrowth kinetics were diffusion-rate controlled, allowing precise size tuning.
    • Spectroscopic analysis confirmed the absence of local interparticle coupling due to polymer shells.

    Conclusions:

    • The developed method provides a versatile platform for creating plasmonic nanoparticle libraries.
    • This approach enables precise control over particle size and spacing for optical applications.
    • The findings open perspectives for screening size effects and exploring plasmonic coupling variations.