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Comments on ‘‘An Essay on Contact Angle Measurements’’: Determination of Surface Roughness and Modeling of the Wetting Behavior

AuthorsTerriza, Antonia ; Álvarez, Rafael ; Yubero, Francisco ; Borrás, Ana ; González-Elipe, Agustín R.
KeywordsAtomic force microscopy
Surface roughness
Water contact angle
Wenzel equation
Issue Date8-Jun-2011
CitationPlasma Processes and Polymers 8: 998–1002 (2011)
AbstractThis commentary addresses the problem of determining surface roughness values and their use to assess the wetting behavior of surfaces. For very rough surfaces it is shown that depending on the observation scale by atomic force microscopy (AFM) quite different RMS roughness values can be obtained and that only the values taken at saturation can be used for properly describing the roughness of the examined materials. This effect has clear consequences when trying to apply wetting models to account for the influence of roughness on contact angles. These ideas are discussed with examples taken from rough polymer surfaces subjected to plasma etching.
Description5 páginas
Publisher version (URL)http://dx.doi.org/10.1002/ppap.201100081
Appears in Collections:(ICMS) Artículos
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