Wetting in hydrophobic nanochannels: A challenge of classical capillarity

被引：68

作者：

Helmy, R

Kazakevich, Y

Ni, CY

Fadeev, AY ^{[1
]}

机构：

[1] Seton Hall Univ, Dept Chem & Biochem, S Orange, NJ 07079 USA

[2] Univ Delaware, Dept Mat Sci & Engn, Newark, DE 19716 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2005年 / 127卷 / 36期

关键词：

D O I：

10.1021/ja053267c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report an investigation of the water-hydrophobic interface in well-defined nanochannels (R ≈ 2-4 nm). Wetting in these systems cannot be described by classical (macroscopic) capillary theory: (1) water occupies only a fraction (∼60%) of the pore volume, and (2) the capillary pressures are ∼60-90% greater than predicted by the Laplace equation. The results suggest the presence of ∼ 0.6 nm layer of low-density fluid (vapor) separating water from the hydrophobic solid. Copyright © 2005 American Chemical Society.

引用

收藏

页码：12446 / 12447

页数：2

相关论文

共 16 条

[1] CAPILLARY PHENOMENA IN EXTREMELY THIN ZEOLITE CHANNELS AND METAL-DIELECTRIC INTERACTION [J].

BOGOMOLOV, VN .

PHYSICAL REVIEW B, 1995, 51 (23) :17040-17045

[2]

Churaev NV, 2003, ADV COLLOID INTERFAC, V103, P197

[3]

Derjaguin B, 1987, SURFACE FORCES

[4] Energetics: A new field of applications for hydrophobic zeolites [J].

Eroshenko, V ;

Regis, RC ;

Soulard, M ;

Patarin, J .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (33) :8129-8130

[5] Trialkylsilane monolayers covalently attached to silicon surfaces: Wettability studies indicating that molecular topography contributes to contact angle hysteresis [J].

Fadeev, AY ;

McCarthy, TJ .

LANGMUIR, 1999, 15 (11) :3759-3766

[6] Study of penetration of water into hydrophobized porous silicas [J].

Fadeev, AY ;

Eroshenko, VA .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1997, 187 (02) :275-282

[7]

ISRAELASHVILI J, 1992, INTERMOLECULAR SURFA

[8] Water in contact with extended hydrophobic surfaces: Direct evidence of weak dewetting [J].

Jensen, TR ;

Jensen, MO ;

Reitzel, N ;

Balashev, K ;

Peters, GH ;

Kjaer, K ;

Bjornholm, T .

PHYSICAL REVIEW LETTERS, 2003, 90 (08) :4-086101

[9] Intrusion and extrusion of water in hydrophobic mesopores [J].

Lefevre, B ;

Saugey, A ;

Barrat, JL ;

Bocquet, L ;

Charlaix, E ;

Gobin, PF ;

Vigier, G .

JOURNAL OF CHEMICAL PHYSICS, 2004, 120 (10) :4927-4938

[10] Hydrophobicity at small and large length scales [J].

Lum, K ;

Chandler, D ;

Weeks, JD .

JOURNAL OF PHYSICAL CHEMISTRY B, 1999, 103 (22) :4570-4577