Abstract
Is there a low-density region ("gap") between water and a hydrophobic surface? Previous x-ray and neutron reflectivity results have been inconsistent because the effect (if any) is subresolution 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.
| Original language | English |
|---|---|
| Article number | 037803 |
| Journal | Physical review letters |
| Volume | 105 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Jul 15 2010 |
ASJC Scopus subject areas
- Physics and Astronomy(all)
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Cite this
Chattopadhyay, S., Uysal, A., Stripe, B., Ha, Y. G., Marks, T. J., Karapetrova, E. A., & Dutta, P. (2010). How water meets a very hydrophobic surface. Physical review letters, 105(3), [037803]. https://doi.org/10.1103/PhysRevLett.105.037803