Micropatterning and Impedance Characterization of an Electrically Percolating Layer‐by‐Layer Assembly
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Micropatterned layer-by-layer (LbL) assemblies were studied as a potential platform for sensor applications by performing impedance characterization throughout a range of electrolyte concentrations. Conductive LbL thin films were prepared with carbon black nanoparticles dispersed in the polymer matrix to provide an electrically conductive network. LbL assemblies were micropatterned using a photolithographic lift-off method, and a test circuit was constructed as multiple interdigitating coplanar electrodes. Impedance spectra were collected between 104 and 106 Hz within a flow cell containing NaCl solutions ranging from 0.001-1.0 M. These preliminary results demonstrate the ability to pattern conductive LbL composites and underscore the potential utility and shortcomings of their use in sensor applications. © 2007 Wiley-VCH Verlag GmbH & Co. KGaA.
author list (cited authors)
Everett, W. N., Jan, C. J., Sue, H., & Grunlan, J. C.