Abstract
The effect of surface heterogeneity on contact angle hysteresis is studied by using the model of Neumann and Good of a vertical plate with horizontal heterogeneous strips. The results of this study explain well known, but not understood patterns of contact angle behaviour: On the one hand, the advancing contact angle on a carefully prepared solid surface is generally reproducible; on the other hand, even a very small amount of surface heterogeneity may cause the receding contact angle to be less reproducible and to depend on several non-thermodynamic factors.
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Li, D., Neumann, A.W. Surface heterogeneity and contact angle hysteresis. Colloid Polym Sci 270, 498–504 (1992). https://doi.org/10.1007/BF00665995
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DOI: https://doi.org/10.1007/BF00665995