3Argento C,French R H.Parametric tip model and force-distance relation for hamaker contact determination from atomic force microscopy.J Appl Phys,1996,80(11):6081
4Dedov G V,Dyshekov M B.Deformation of the contact region and adhensional friction between nanoprobe and surface.Surf Sci,2000,463:125
5Matsunaga T,Tamai Y.Dispersion force component of surface energy for metals.Surf Sci,1976,57:431