Apart from using the energy dissipation factor in QCM-measurements, it is possible to gain even more information from a viscoelastic sample by monitoring multiple overtones.
In this overview, we take a closer look at what information the overtones offer. We are considering theoretical polymer layers with various thicknesses.
The overview includes information on:
how each overtone provides a different perspective of the sample material
how the shear amplitude varies with the harmonic and the sensor load
how the f and D responses for the overtones depend on the layer properties