Effects of nanorod structure and conformation of fatty acid self-assembled layers on superhydrophobicity of zinc oxide surface

被引:68
作者
Badre, Chantal
Dubot, P.
Lincot, Daniel
Pauporte, Thierry
Turmine, Mireille
机构
[1] Univ Paris 06, UMR 7575, LECA, F-75252 Paris, France
[2] Univ Paris 06, Ecole Natl Super Chim, LECA, UMR 7575, F-75231 Paris, France
[3] Univ Paris 06, Ecole Natl Super Chim, Lab Physcochim Surfaces, UMR 7045, F-75231 Paris, France
关键词
biomimetic; superhydrophobic zinc oxide; electrodeposition; surface derivatization; fatty acids orientation; well-packed monolayers;
D O I
10.1016/j.jcis.2007.07.046
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Superhydrophobic surfaces have been prepared from nanostructured zinc oxide layers by a treatment with fatty acid molecules. The layers are electrochemically deposited from an oxygenated aqueous zinc chloride solution. The effects of the layer's structure, from a dense film to that of a nanorod array, as well as that of the properties of the fatty acid molecules based on C18 chains are described. A contact angle (CA) as high as 167 degrees is obtained with the nanorod structure and the linear saturated molecule (stearic acid). Lower values are found with molecules having an unsaturated bond on C9, in particular with a cis conformation (140 degrees). These results, supplemented by infrared spectroscopy, indicate an enhancement of the sensitivity to the properties of the fatty acid molecules (conformation, flexibility, saturated or not) when moving from the flat surface to the nanostructured surface. This is attributed to a specific influence of the structure of the tops of the rods and lateral wall properties on the adsorption and organization of the molecules. CA measurements show a very good stability of the surface in time if stored in an environment protected from UV radiations. (C) 2007 Elsevier Inc. All rights reserved.
引用
收藏
页码:233 / 237
页数:5
相关论文
共 39 条
[1]  
BADRE C, 2007, IN PRESS SUPERLAT MI
[2]   Modification of the wettability of a polymeric substrate by pH effect. Determination of the surface acid dissociation constant by contact angle measurements [J].
Badre, Chantal ;
Mayaffre, Alain ;
Letellier, Pierre ;
Turmine, Mireille .
LANGMUIR, 2006, 22 (20) :8424-8430
[3]   Tailoring the wettability of TiO2 nanotube layers [J].
Balaur, E ;
Macak, JM ;
Taveira, L ;
Schmuki, P .
ELECTROCHEMISTRY COMMUNICATIONS, 2005, 7 (10) :1066-1070
[4]   Purity of the sacred lotus, or escape from contamination in biological surfaces [J].
Barthlott, W ;
Neinhuis, C .
PLANTA, 1997, 202 (01) :1-8
[5]   Wettability of porous surfaces. [J].
Cassie, ABD ;
Baxter, S .
TRANSACTIONS OF THE FARADAY SOCIETY, 1944, 40 :0546-0550
[6]   Ultrahydrophobic and ultralyophobic surfaces:: Some comments and examples [J].
Chen, W ;
Fadeev, AY ;
Hsieh, MC ;
Öner, D ;
Youngblood, J ;
McCarthy, TJ .
LANGMUIR, 1999, 15 (10) :3395-3399
[7]   The octa-twin tetraleg ZnO nanostructures [J].
Dai, Y ;
Zhang, Y ;
Wang, ZL .
SOLID STATE COMMUNICATIONS, 2003, 126 (11) :629-633
[8]   Novel nanostructures of functional oxides synthesized by thermal evaporation [J].
Dai, ZR ;
Pan, ZW ;
Wang, ZL .
ADVANCED FUNCTIONAL MATERIALS, 2003, 13 (01) :9-24
[9]   The fabrication and switchable superhydrophobicity of TiO2 nanorod films [J].
Feng, XJ ;
Zhai, J ;
Jiang, L .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2005, 44 (32) :5115-5118
[10]   Oxygen reduction reaction on electrodeposited zinc oxide electrodes in KC1 solution at 70°C [J].
Goux, A ;
Pauporté, T ;
Lincot, D .
ELECTROCHIMICA ACTA, 2006, 51 (15) :3168-3172