Overview

The Sauerbrey Relation

In the context of QCM technology, there is often a reference to the so-called Sauerbrey equation. The Sauerbrey equation is a linear relationship between the resonance frequency of an oscillating quartz crystal and mass changes. It can be used to calculate the mass of thin and rigid films deposited on the sensor.

In this overview we derive the equation and explain the different parameters.

Overview details

  • Length
    2 pages
  • Technologies
    QCM-D
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The Sauerbrey relation

In this overview:

  • How the Sauerbrey equation relates QCM frequency shifts to small mass changes.

  • When and why the equation is valid for thin, rigid, and firmly attached layers.

  • The fundamental principles, application, and assumptions behind the equation.

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