How Water Meets a Very Hydrophobic Surface

被引：72

作者：

Chattopadhyay, Sudeshna ^{[1
]}

Uysal, Ahmet ^{[1
]}

Stripe, Benjamin ^{[1
]}

Ha, Young-geun ^{[2
]}

Marks, Tobin J. ^{[2
]}

Karapetrova, Evguenia A. ^{[3
]}

Dutta, Pulak ^{[1
]}

机构：

[1] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

[2] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

[3] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 03期

基金：

美国国家科学基金会;

关键词：

SELF-ASSEMBLED MONOLAYERS; X-RAY; INTERFACES; DENSITY; REFLECTIVITY; DEPLETION; CHEMISTRY; LAYER;

D O I：

10.1103/PhysRevLett.105.037803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：4

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