Voltammetric Detection of Hg2+ Using Peptide-Functionalized Polymer Brushes
Nicolas Schüwer A , Mary-Lou Tercier-Waeber B , Maarten Danial A and Harm-Anton Klok A C
+ Author Affiliations
- Author Affiliations
A École Polytechnique Fédérale de Lausanne (EPFL), Institut des Matériaux and Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères, Bâtiment MXD, Station 12, 1015 Lausanne, Switzerland.
B Analytical and Environmental Chemistry, Department of Inorganic and Analytical Chemistry, University of Geneva Sciences II, 30 Quai E.-Ansermet, 1211 Geneva 4, Switzerland.
C Corresponding author. Email: harm-anton.klok@epfl.ch
Australian Journal of Chemistry 65(8) 1104-1109 https://doi.org/10.1071/CH12177
Submitted: 30 March 2012 Accepted: 10 May 2012 Published: 14 June 2012
Abstract
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.
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