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Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance
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Low-cost plastic plasmonic substrates for operation in aqueous environments.

Ramamurthy Sai Sathish1, Yordan Kostov, Govind Rao

  • 1Center for Advanced Sensor Technology and Department of Chemical and Biochemical Engineering, University of Maryland Baltimore County, 1000 Hilltop Circle, Baltimore, Maryland 21250, USA.

Applied Spectroscopy
|November 16, 2010
PubMed
Summary

We designed a novel multilayer stack for enhanced surface-plasmon-coupled emission (SPCE) in liquids. This optimized configuration reduces the SPCE exit angle, improving light collection without specialized optics.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Surface Science

Background:

  • Surface-plasmon-coupled emission (SPCE) enables enhanced light emission.
  • Controlling SPCE in liquid environments is crucial for applications.
  • Existing methods often require complex optical setups.

Purpose of the Study:

  • To develop a novel multilayer stack for enhanced SPCE in liquid media.
  • To optimize the stack configuration for long-range surface plasmons.
  • To reduce the SPCE exit angle for improved light collection efficiency.

Main Methods:

  • Numerical simulations to determine optimal multilayer thickness.
  • Fabrication of SPCE substrates on BK7 glass and Teflon-AF coated polycarbonate (PC-T).
  • Surface modification using plasma etching to alter functionalities.

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Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment
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Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment

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Main Results:

  • An optimal multilayer stack configuration supporting long-range surface plasmons was identified.
  • Teflon-AF coating on polycarbonate substrates reduced the SPCE exit angle.
  • SPCE exit angle decreased from 75° (BK7) to 60° (PC-T) in water.

Conclusions:

  • The novel multilayer design effectively enhances SPCE in liquid media.
  • The optimized PC-T substrate significantly reduces the SPCE exit angle.
  • This approach offers a simpler method for efficient light collection in SPCE applications.