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Reference type: Journal
Authors: Ray RJ
Article Title: Development of polymer coated surface plasmon resonance sensors.
Publication date: 2003
Journal: Abstracts of Papers of the American Chemical Society
Volume: 226
Issue: (ANYL)
Page numbers: 048.

Abstract: Surface plasmon resonance is one of the latest sensing techniques, which has a wide range of application and adaptation. Plasmon resonance or evanescent waves are produced when delocalized metal electrons absorb a fraction of polarized light incident upon a metal film at a critical angle. These evanescent waves penetrate the thin metal coating and propagate 200 to 300 nm on the other side of the metal into the sample. Surface plasmon resonance sensors take advantage of characteristic shifts in light absorption due to analyte sorption onto a polymer coating. Dip coating self-assembled monolayers (SAMs) or polymer spin coating has been employed for selective analyte enrichment. However, existing coating techniques do not easily afford cross-linked polymer coatings in the 200 to 300nm film thickness ranges necessary for robust, optimum SPR sensing. This research uses a living radical polymerization catalyst tethered to the sensor surface through a gold-thiol bond. Polymer films are then grown in a controlled fashion from the gold surface allowing a variety of monomers and cross-linking agents to be used dependent upon the application. Ultimately , this polymerization technique can be applied to imprinted polymers for enhanced analyte selectivity for surface plasmon resonance applications.

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