Methods for Calibrating the Electrochemical Quartz Crystal Microbalance: Frequency to Mass and Compensation for Viscous Load

The main output from an Electrochemical Quartz Crystal Microbalance is a frequency shift. This note describes how to separate the mass- and viscous load contributions to this shift by a calibration procedure. The mass calibration is made by electroplating from a copper sulfate solution in ethanol/water with 100% current efficiency. An estimate of viscous load is obtained by measuring the energy dissipation and is related to frequency change using the Kanazawa-Gordon equation. Two approaches are discussed: either by performing calibration experiments in a series of water-glycerol mixtures or by following oscillations in frequency and dissipation by collecting data during the stabilization phase of the experiment.

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Stefano Mischler, Anna Neus Igual Muñoz
2023
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https://infoscience.epfl.ch/record/305321?ln=en

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