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Multicolor directional surface plasmon-coupled chemiluminescence.

Mustafa H Chowdhury1, Stuart N Malyn, Kadir Aslan

  • 1Center for Fluorescence Spectroscopy, Medical Biotechnology Center, University of Maryland School of Medicine, Baltimore, Maryland, 21201, USA.

The Journal of Physical Chemistry. B
|November 10, 2006
PubMed
Summary
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Researchers observed surface plasmon-coupled chemiluminescence (SPCC) by coupling chemically induced light emission to surface plasmons. This directional, polarized light opens new avenues for chemiluminescence sensing strategies.

Area of Science:

  • Optoelectronics
  • Chemical sensing
  • Plasmonics

Background:

  • Surface plasmon-coupled emission (SPCE) efficiently collects light from optically excited fluorophores.
  • SPCE results in highly directional and polarized emission.
  • Extending SPCE to chemiluminescent species was previously unexplored.

Purpose of the Study:

  • To investigate the coupling of chemiluminescence to surface plasmons.
  • To characterize the properties of surface plasmon-coupled chemiluminescence (SPCC).
  • To explore potential applications of SPCC in chemical sensing.

Main Methods:

  • Utilized thin continuous metal films (aluminum, silver, gold).
  • Coupled light emission from various chemiluminescent species to surface plasmons.

Related Experiment Videos

  • Analyzed the directionality and polarization of the emitted light.

    • Main Results:

    • Successfully observed surface plasmon-coupled chemiluminescence (SPCC).
    • SPCC exhibited high directionality and predominantly p-polarization.
    • Confirmed that surface plasmons can be directly excited by chemically induced electronic states.
    • Demonstrated SPCC across a range of visible wavelengths and different metals.

    Conclusions:

    • Surface plasmons can be directly excited by chemiluminescence.
    • SPCC offers a novel method for localized, directional, and polarized chemiluminescence detection.
    • This finding has significant implications for developing advanced chemiluminescence-based sensing assays.