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 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
How water meets a very hydrophobic surface. / Chattopadhyay, Sudeshna; Uysal, Ahmet; Stripe, Benjamin; Ha, Young Geun; Marks, Tobin J; Karapetrova, Evguenia A.; Dutta, Pulak.
In: Physical Review Letters, Vol. 105, No. 3, 037803, 15.07.2010.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - How water meets a very hydrophobic surface
AU - Chattopadhyay, Sudeshna
AU - Uysal, Ahmet
AU - Stripe, Benjamin
AU - Ha, Young Geun
AU - Marks, Tobin J
AU - Karapetrova, Evguenia A.
AU - Dutta, Pulak
PY - 2010/7/15
Y1 - 2010/7/15
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=77954789543&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77954789543&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.105.037803
DO - 10.1103/PhysRevLett.105.037803
M3 - Article
AN - SCOPUS:77954789543
VL - 105
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 3
M1 - 037803
ER -