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Applied Optics

Applied Optics


  • Vol. 40, Iss. 34 — Dec. 1, 2001
  • pp: 6242–6245

Waveguide surface plasmon resonance sensor for electrochemically controlled surface reactions

Jude C. Abanulo, Richard D. Harris, Philip N. Bartlett, and James S. Wilkinson  »View Author Affiliations

Applied Optics, Vol. 40, Issue 34, pp. 6242-6245 (2001)

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Electrochemical oxidation of the surface of a thin gold film overlaid on an optical waveguide and placed in a cell containing sulfuric acid is monitored by integrated optical surface plasmon resonance (IOSPR) combined with cyclic voltammetry. Waveguide transmittance correlates well with the charge transferred to and from the electrode to oxidize and reduce the surface, with a 60% reduction in transmittance being observed for complete formation of the surface oxide. IOSPR sensors combined with electrochemical measurement and control show potential for sensitive and robust integrated multisensors for electroactive species.

© 2001 Optical Society of America

OCIS Codes
(000.1570) General : Chemistry
(130.3120) Integrated optics : Integrated optics devices
(130.6010) Integrated optics : Sensors
(240.0240) Optics at surfaces : Optics at surfaces
(310.6860) Thin films : Thin films, optical properties

Original Manuscript: November 27, 2000
Revised Manuscript: July 10, 2001
Published: December 1, 2001

Jude C. Abanulo, Richard D. Harris, Philip N. Bartlett, and James S. Wilkinson, "Waveguide surface plasmon resonance sensor for electrochemically controlled surface reactions," Appl. Opt. 40, 6242-6245 (2001)

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