1 research outputs found
Creation of Superwetting Surfaces with Roughness Structures
In this work, we explored the possibility
of creating superwetting
surfaces, which are defined here as those with apparent contact angles
of <5°, using roughness structures for the purpose of eliminating
the surface tension effect on a floating small plate, which is denser
than the surrounding liquid. The roughness ratio is often thought
to play a critical role in generating superwetting surfaces. However,
we found that the top surface ratio had more influence on apparent
contact angles. When this ratio was <0.013, the resulting apparent
contact angle might be less than 5°, when the intrinsic contact
angle was ≥40°. Accordingly, hybrid micro- and nanostructures,
which had such a small ratio, were chosen to create the superwetting
surfaces. These surfaces were subsequently applied to eliminate the
surface tension effect on a small plate. As a result of this elimination,
the small plate sank down to the bottom of the liquid