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The resistivity ρ(PEM) of polyelectrolyte multilayers (PEMs), PEI(PSS/PAH)(24), PEI(PGA/PAH)(12), PEI(HA/PLL)(12) and PEI(PSS/PLL)(12), in a free-hanging configuration was estimated combining electrochemical impedance spectroscopy (EIS) and atomic force microscopic (AFM) images. Surprisingly, the obtained value of several kΩcm is at least 6 orders of magnitude lower than that reported previously, where the resistivity was determined in the conventional PEM-on-electrode system. The significant discrepancy indicates the unexpectedly low electrical PEM resistance in the absence of redox-active ions and the sensitivity limitation in the conventional system.
|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||04 Faculty of Medicine > Institute of Biomedical Engineering|
610 Medicine & health
|Deposited On:||27 Jan 2011 17:22|
|Last Modified:||04 Apr 2012 15:43|
|Publisher:||American Chemical Society|
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