How water meets a very hydrophobic surface
Soft Condensed Matter
2010-07-22 v1 Fluid Dynamics
Abstract
Is there a low-density region ('gap') between water and a hydrophobic surface? Previous X-ray/neutron reflectivity results have been inconsistent because the effect (if any) is sub-resolution for the surfaces studied. We have used X-ray reflectivity to probe the interface between water and more hydrophobic smooth surfaces. The depleted region width increases with contact angle and becomes larger than the resolution, allowing definitive measurements. Large fluctuations are predicted at this interface; however, we find that their contribution to the interface roughness is too small to measure.
Cite
@article{arxiv.1006.4620,
title = {How water meets a very hydrophobic surface},
author = {Sudeshna Chattopadhyay and Ahmet Uysal and Benjamin Stripe and Young-geun Ha and Tobin J. Marks and Evguenia A. Karapetrova and Pulak Dutta},
journal= {arXiv preprint arXiv:1006.4620},
year = {2010}
}
Comments
6 pages, 3 figures; Phys. Rev. Lett., to be published