The Hertz Model in AFM Nanoindentation Experiments: Applications in Biological Samples and Biomaterials

AFM nanoindentation is a modern technique which is used for the determination of the mechanical properties of materials and biomaterials. With regards to the nanoindentation procedure, several models of applied mechanics can be used for data processing such as the Hertz model which is used in the case of spherical indenters. The purpose of this review is to provide a complete presentation of the Hertz model theory, commonly used model in the fields of Biophysics and Biomaterials as well as in other related applications. In addition, the theory which correlates the Hertz model and the general nanoindentation equation for Young's modulus determination is presented.