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A Potassium-Selective Quartz Crystal Microbalance Sensor Based on Crown-Ether Functionalized Polymer Brushes

Authors

  • Nicolas Schüwer,

    1. Ecole Polytechnique Fédérale de Lausanne (EPFL), Institut des Matériaux et Institut des Sciences et, Ingénierie Chimiques, Laboratoire des Polymères, Bâtiment MXD, Station 12, CH-1015 Lausanne (Switzerland)
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  • Harm-Anton Klok

    Corresponding author
    1. Ecole Polytechnique Fédérale de Lausanne (EPFL), Institut des Matériaux et Institut des Sciences et, Ingénierie Chimiques, Laboratoire des Polymères, Bâtiment MXD, Station 12, CH-1015 Lausanne (Switzerland)
    • Ecole Polytechnique Fédérale de Lausanne (EPFL), Institut des Matériaux et Institut des Sciences et, Ingénierie Chimiques, Laboratoire des Polymères, Bâtiment MXD, Station 12, CH-1015 Lausanne (Switzerland).
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Abstract

original image

Benzo-15-crown-5 functionalized polymer brushes prepared via surface-initiated atom transfer radical polymerization are used as the active layer in a potassium-selective quartz crystal microbalance sensor. The polymer brushes allow the selective detection of potassium ions, even in the presence of a large excess of sodium ions and the sensitivity of the sensor can be tuned by varying the brush thickness.

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