Optical Surface Plasmon Resonance Monitoring in a High Salinity Environment for Long Duration Sensing Applications
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Author(s)
Abstract
Optical sensing modes such as Surface Plasmon Resonance (SPR) are here applied to the detection surface induced processes and surface corrosion. Our recent studies have investigated the noble metals: silver, copper and gold. We present here results for silver sputter deposited films, with a sputter deposited chromium adhesion layer for exposure to a corrosive environment of standard saline solution over two months. Initial sensor design was achieved using a formalism of Fresnel’s optical equations for a uniaxial multi-layered media. Changes in metal film optical properties were measured using the Kretchmann-Raether experimental optical configuration. The study found that after films were exposed to standard saline solution, their reflectivity and relative permittivity changed, detectable as a shift in the minimum angle and shape of a SPR reflectivity curve whilst the thickness of the silver film was uncorroded.
Keywords
Metal Corrosion, Surface Plasmon Resonance, Permittivity Changes
Cite this paper
Christopher Lavers, Alistair Cree, David Jenkins, Nasih Salah, Matthew Findlay, Ian Hooper,
Optical Surface Plasmon Resonance Monitoring in a High Salinity Environment for Long Duration Sensing Applications
, SCIREA Journal of Metallurgical Engineering.
Volume 3, Issue 1, February 2018 | PP. 1-12.
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