AFM dynamic mode

In the previous section we described static capillary forces. Viscous forces may also bring an additional contribution that will be readily measured with AFM dynamical modes. Therefore, in the framework of AFM studies, it is of interest to evaluate the effect of the liquid viscosity. We distinguish two cases corresponding to different configurations discussed in the next section of this chapter. We first evaluate the viscous force compared to the capillary one and then the effect of the boundary condition. 

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