Abstract
The shear force detection by using a tuning fork plays a key role in the implement all kinds of scanning probe microscopes. This paper presents primary results of modeling dynamics of a tuning fork. The obtained model considers not only the piezoelectric properties and mechanical properties of the tuning fork, but also the electric-mechanical coupling between the two prongs of the tuning fork. It has been shown by theoretical studies and experiment results that the theoretical model can fit the amplitude and phase responses of a tuning fork.