Surface Roughness Corrected Contact Angle – Whitepaper

Posted on November 5, 2015

In this white paper we will take an in-depth look at the principles underlying the 3D Topography Module method, resulting roughness parameters, and also the Wenzel theory used for roughness corrected contact angles. We will also highlight applications and samples that are feasible for this method.

Measuring surface roughness together with contact angle makes it possible to separate the influence of surface chemistry from surface roughness on wetting and adhesion behaviour. This is especially important when working with different types of surface modifications where both surface chemistry and surface topography are altered.
Until now, contact angle and surface roughness have only been measured individually by using an optical tensiometer and a separate roughness measurement instrument. The Attension Theta Optical Tensiometer with 3D Topography Module, enables automated measurement of the surface roughness on the same sample location as the contact angle measurement by using automated XYZ sample movement. With the included software OneAttension, surface roughness and roughness corrected contact angles are calculated automatically.


Surface roughness and wettability Download White Paper