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Polymer brushes grafted by surface-initiated atom transfer radical polymerization (SI-ATRP) from the surface of Ir-based microelectrode arrays are explored as a platform for the fabrication of sensory coatings for the voltammetric detection of Hg2+. The polymer brush coatings are post-modified with a metallothionein derived peptide to enable the selective detection of Hg2+. The performance of the polymer brush modified microelectrode arrays was evaluated using both cyclic voltammetry (CV) as well as square-wave anodic stripping voltammetry (SWASV) experiments. These studies revealed that the polymer brush based coatings allowed the selective detection of Hg2+ with detection limits in the subnanomolar range.
Hubert Girault, Andreas Stephan Lesch, Milica Jovic, Victor Costa Bassetto, Léopoldine Guenang Sonfack
Paul Joseph Dyson, Lucinda Kate Batchelor, Silvia Schoch
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