A nanoscale meniscus bridge is formed when ultrathin liquid films exist in the gap between two solid surfaces. Due to conventional bulk theory, an adhesive force caused by the meniscus bridge is given as a function of bridge length, curvature of surfaces, surface separation, and surface tension of liquid film. On the other hand, effects of surface roughness on a meniscus bridge must be introduced to the theory or model for the meniscus bridge when the surface roughness is comparable with the length of a meniscus bridge. In this study, experiments and modeling for a meniscus bridge formed between rough and smooth surfaces are performed. We will show that the maximum adhesive force between two surfaces depends on the height of the meniscus bridge taking the geometry of the rough surface into account.
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