The Quartz Crystal Microbalance in Soft Matter Research

Part of the series Soft and Biological Matter pp 343-358


Other Surface-Acoustic-Wave Based Instruments

  • Diethelm JohannsmannAffiliated withInstitute of Physical Chemistry, Clausthal University of Technology Email author 

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There is a variety of sensing instruments making use of acoustic waves (often shear waves) near interfaces. Among the concepts shared between the QCM and these instruments are the mass sensitivity and the acoustic reflectivity as a central intermediate parameter. The kHz resonators measure viscoelastic parameters at frequencies more relevant to most applications than MHz frequencies. On the other hand, they are less sensitive. Smaller resonators operating at higher frequencies tend to have better mass-sensitivity.