Numerical study of multilayer adsorption on fractal surfaces - art. no. 041601

We report a numerical study of van der Waals adsorption and capillary conde nsation effects oil self-similar fractal surfaces. An assembly of uncoupled spherical pores with a power-law distribution of radii is used to model fr actal surfaces with adjustable dimensions. We find that the commonly used f ractal Frankel-Halsey-Hill equation systematically fails to give the correc t dimension due to crossover effects, consistent with the findings of recen t experiments. The effects of pore coupling and curvature dependent surface tension were also studied.