The Geometry-Induced Superhydrophobic Property of Carpet-like Zinc Films

Carpet-like zinc films with unique nanowires are fabricated by using a simple physical evaporation method. The definite morphologies of the films endow the superhydrophobic material with a contact angle of about 157.9°, and by additional modification of CF3(CF2)7CH2CH2Si(OCH3)3 the water adhesive force could be tuned from 58.3 μN to 14.6 μN. In order to analyze the controllable adhesion of superhydrophobic Zn films, we study the microstructure and chemical compositions of the films by x-ray diffraction SEM, TEM, HRTEM and EDAX. Furthermore, a model based on the balance of micro-surface energy is proposed to illustrate the relationship of the geometry and wettability properties of the films. The model provides new insights into how to design-oriented microchannels and micro-protuberance on material surfaces, which is of benefit for controlling their ability of caught-collection in air bubbles and water-pinning collection.

[1]  W. Xinwei,et al.  Observation of Nucleate Boiling on a Fine Copper Wire with Superhydrophobic Micropatterns , 2012 .

[2]  Y. Wan,et al.  Fabrication and wear protection performance of superhydrophobic surface on zinc , 2011 .

[3]  Libang Feng,et al.  Superhydrophobic alumina surface based on stearic acid modification , 2011 .

[4]  Bao-Lian Su,et al.  Superhydrophobic surfaces: from natural to biomimetic to functional. , 2011, Journal of colloid and interface science.

[5]  Mingjie Liu,et al.  Switchable Adhesion on Liquid/Solid Interfaces , 2010 .

[6]  Lei Jiang,et al.  Bioinspired Ribbed Nanoneedles with Robust Superhydrophobicity , 2010 .

[7]  A. Raman,et al.  Understanding organic film behavior on alloy and metal oxides. , 2010, Langmuir : the ACS journal of surfaces and colloids.

[8]  Gareth H McKinley,et al.  Robust omniphobic surfaces , 2008, Proceedings of the National Academy of Sciences.

[9]  Lan Sun,et al.  Markedly controllable adhesion of superhydrophobic spongelike nanostructure TiO2 films. , 2008, Langmuir : the ACS journal of surfaces and colloids.

[10]  H. Zhen-hui,et al.  Superhydrophobicity of LaMnO 3 Coatings with Hierarchical Microstructures , 2008 .

[11]  T. Salamon,et al.  Nanonails: a simple geometrical approach to electrically tunable superlyophobic surfaces. , 2008, Langmuir : the ACS journal of surfaces and colloids.

[12]  Zhiguang Guo,et al.  Sticky superhydrophobic surface , 2007 .

[13]  Di Gao,et al.  Design and fabrication of micro-textures for inducing a superhydrophobic behavior on hydrophilic materials. , 2007, Langmuir : the ACS journal of surfaces and colloids.

[14]  Wang Hua-bin,et al.  Effects of substrate hydrophobicity/hydrophilicity on height measurement of individual DNA molecules , 2007 .

[15]  Abraham Marmur,et al.  Underwater superhydrophobicity: theoretical feasibility. , 2006, Langmuir : the ACS journal of surfaces and colloids.

[16]  Abraham Marmur,et al.  The Lotus effect: superhydrophobicity and metastability. , 2004, Langmuir : the ACS journal of surfaces and colloids.

[17]  Abraham Marmur,et al.  Wetting on Hydrophobic Rough Surfaces: To Be Heterogeneous or Not To Be? , 2003 .

[18]  Stephan Herminghaus,et al.  Roughness-induced non-wetting , 2000 .