Surface Plasmon Resonance Detection of Metal Ions: Layer-by-Layer Assembly of Polyelectrolyte Sensing Layers on a Multichannel Chip

Abstract

A single-chip multichannel surface plasmon resonance sensor (SPR) has been used to detect metal ions in aqueous solutions. The equipment was designed around a commercial light-emitting diode and a CCD camera and incorporated no moving parts. The sensing materials were based on molecular architectures of polyelectrolyte films, deposited by the layer-by-layer self-assembly technique. Two bilayer architectures, poly(ethyleneimine) (PEI)/poly(ethylene-alt-maleic acid) and PEI/poly(styrenesulfonate), were shown to produce different responses to solutions containing copper, nickel, and iron. The SPR equipment was able to measure concentrations of these metals down to levels of at least 2 10 5 M.

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Cite this paper

@inproceedings{Palumbo2005SurfacePR, title={Surface Plasmon Resonance Detection of Metal Ions: Layer-by-Layer Assembly of Polyelectrolyte Sensing Layers on a Multichannel Chip}, author={Marco Antonio Palumbo and J{\"{u}rgen Nagel and Michael C. Petty}, year={2005} }