Journal
ELECTROCHIMICA ACTA
Volume 53, Issue 2, Pages 487-494Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2007.07.018
Keywords
polymer brush; electrochemical impedance spectroscopy; responsive surfaces
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Poly(1-ethyl 3-(2-methacryloyloxy ethyl) imidazolium chloride) (PEMEIm-Cl) brushes were grafted onto An surface via surface initiated atom transfer radical polymerization (ATRP). The swelling/collapsed behavior of the brushes was characterized by AFM in different electrolyte solutions. These 15 nm ultrathin polyelectrolyte brushes can be used to modulate the interfacial resistance via conformational changes triggered by external electrolytes and solvent. The interfacial resistance was characterized using electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) using [Fe(CN)(6)](3-/4-) as the redox probe. The effects of electrolytes, the concentration and type of electrolytes and temperature are investigated in more detail. (c) 2007 Elsevier Ltd. All rights reserved.
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