Evaluation, surface modification direct method

The direct method is used to evaluate surface modification results by measuring surface property changes of whiskers before and after modification. 

There are two different methods of surface modification evaluation of inorganic whiskers the direct method and the indirect method. 

An objective comparison of the abrasion resistance of superhydrophobic surfaces has been hampered by the lack of a single, standardized test method. Likewise, no single measure has been used for characterizing the effect of wear. Moreover, all these different approaches induce very diverse surface topography modifications but at the same time all of them are referred as mechanical durability tests. This is very confusing for someone who wants to evaluate how durable is one surface compared to the other. Generally, abrasion resistance is most directly and commonly measured using linear shear abrasion. In this form, shear stress arises from the force vector component parallel to the cross section of the material. The most common approach, based on the number of published papers, for the evaluation of the mechanical durability of liquid repellent surfaces is... 

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