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Related Experiment Video

Updated: May 31, 2026

Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance
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High aspect ratio plasmonic nanostructures for sensing applications.

Birgit Päivänranta1, Hannes Merbold, Reto Giannini

  • 1Laboratory for Micro- and Nanotechnology, Paul Scherrer Institut, CH-5232 Villigen-PSI, Switzerland.

ACS Nano
|July 13, 2011
PubMed
Summary

High aspect ratio nanostructures with split-ring resonator-like cross sections show high performance for sensing applications. These plasmonic structures offer enhanced sensitivity and tunable properties for advanced sensing technologies.

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Published on: September 27, 2011

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Last Updated: May 31, 2026

Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance
13:37

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Published on: April 1, 2013

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

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Published on: January 3, 2016

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
09:29

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

Published on: September 27, 2011

Area of Science:

  • Nanophotonics and Plasmonics
  • Materials Science
  • Sensing Technologies

Background:

  • Plasmonic modes in nanostructures are crucial for sensing applications.
  • High aspect ratio nanostructures offer unique optical properties.

Purpose of the Study:

  • To experimentally and theoretically study plasmonic modes in high aspect ratio nanostructures.
  • To demonstrate their high performance for sensing applications.
  • To compare different cross-sectional profiles for optimal sensing.

Main Methods:

  • Top-down fabrication process for ordered nanostructures.
  • Experimental characterization of plasmonic modes.
  • Theoretical modeling of optical properties.

Main Results:

  • Split-ring resonator-like cross sections exhibit pronounced polarization dependence and strong field enhancement.
  • These structures show high sensitivity (up to 600 nm/RIU) and figures of merit (>20).
  • Compared to cylindrical nanorods, split-ring structures offer improved mechanical stability and tunability.

Conclusions:

  • High aspect ratio nanostructures with specific cross-sectional designs are highly effective for sensing.
  • Split-ring resonator-like plasmonic structures present significant potential for advanced sensing applications.
  • The demonstrated performance metrics highlight their utility in visible wavelength sensing.