Flexible, Reusable Electrodes for new Applications in Measuring Coating Integrity

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Flexible, Reusable Electrodes for new Applications in Measuring Coating Integrity

From the Lab of Dr. Tami Lasseter Clare, Portland State University, Portland, OR, USA


This technology is a patent pending* flexible hydrogel device for detecting the degradation of various thin coatings in variety of metrology and thin film applications.

*Serial No. PCT/US2014/041743


Innovative new product line in impedance spectroscopy and measurement of coating integrity on metallic and nonmetallic surfaces.



Electrochemical Impedance Spectroscopy is a proven method for measuring surface properties; however, current applications of this technology are limited to rigid planar surfaces. Conductive hydrogel leads developed by Dr. Clare may open new avenues of application in the field of metrology, allowing for measurement of non-planar surfaces which may be

useful in industries such as solar and high voltage electronics.



A conductive anionic hydrogel was synthesized for use as a solid electrolyte for electrochemical impedance spectroscopy (EIS) characterization of the barrier properties of protective coatings. The AMPS-co-PAA hydrogel was soaked in a variety of aqueous salt solutions and characterized by swelling capacity and conductivity in order to determine the most

appropriate gel/liquid electrolyte combination for use on culturally significant objects. K2PIPES-equilibrated hydrogels were selected as the preferred electrodes for this particular application and were used to measure the impedance of a coated substrate, yielding spectra similar to those from standard liquid cells.


Related Web Links

The Lasseter Clare Lab

“Synthesis and Characterization of Flexible Hydrogel Electrodes for Electrochemical Impedance Measurements of Protective Coatings on Metal Sculptures”


Innovation & Intellectual Property Contact

Miska Paulorinne

Innovation Associate

PSU Office: 503-725-8336



Patent Information:
For Information, Contact:
Shaun Mcgillis
Portland State University
Tami Clare
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