Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 10, Issue 31, Pages 4516-4534Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b803960g
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Piezoelectric resonators have been in use as mass-sensing devices for almost half a century. More recently it was recognized that shifts in frequency and bandwidth can come about by a diverse variety of interactions with the sample. The classical load'' consists of a thin film, which shifts the resonance frequency due to its inertia. Other types of loading include semi-infinite viscoelastic media, rough objects contacting the crystal via isolated asperities, mechanically nonlinear contacts, and dielectric films. All these interactions can be analyzed within the small-load approximation. The small-load approximation provides a unified frame for interpretation and thereby opens the way to new applications of the QCM.
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