Abstract
10 MHz QCM quartz crystals, uncoated or coated with films of PMMA and/or PEO, were rapidly submerged into aqueous medium. The changes in these crystals’ resonance frequencies were recorded. In all cases after a few seconds crystal’s resonant frequency became constant at a value that depended upon whether the crystal was polished or etched and whether it was coated or uncoated with a polymer film. A blended polymer film composed of PMMA and PEO, when coated on a QCM crystal and then submerged in water showed a rapid frequency increase corresponding to the removal (leaching) of PEO from the film and creating a porous PMMA film whose pores were filled with water. The porosity of the leached film was determined.
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Published in Russian in Elektrokhimiya, 2017, Vol. 53, No. 10, pp. 1308–1313.
This paper is the authors’ contribution to the special issue of Russian Journal of Electrochemistry dedicated to the 100th anniversary of the birth of the outstanding Soviet electrochemist Veniamin G. Levich.
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Yoo, H.Y., Bruckenstein, S. & Pater, E. Interpretation of the frequency transients accompanying the submersion of a polymer coated QCM quartz crystal in water. Russ J Electrochem 53, 1160–1164 (2017). https://doi.org/10.1134/S1023193517100056
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DOI: https://doi.org/10.1134/S1023193517100056