Extreme resistance of superhydrophobic surfaces to impalement: Reversible electrowetting related to the impacting/bouncing drop test

被引：79

作者：

Brunet, P. ^{[1
]}

Lapierre, F. ^{[2
]}

Thomy, V. ^{[2
]}

Coffinier, Y. ^{[3
]}

Boukherroub, R. ^{[3
]}

机构：

[1] CNRS, UMR 8107, Lab Mecan Lille, F-59655 Villeneuve Dascq, France

[2] CNRS, UMR 8520, Inst Elect Microelect & Nanotechnol, F-59652 Villeneuve Dascq, France

[3] Inst Rech Interdisciplinaire, USR 3078, F-59652 Villeneuve Dascq, France

来源：

LANGMUIR | 2008年 / 24卷 / 19期

关键词：

D O I：

10.1021/la801268v

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The paper reports on the comparison of the wetting properties of superhydrophobic silicon nanowires (NWs), using drop impact impalement and electrowetting (EW) experiments. A correlation between the resistance to impalement on both EW and drop impact is shown. From the results, it is evident that when increasing the length and density of NWs (i) the thresholds for drop impact and EW irreversibility increase and (ii) the contact-angle hysteresis after impalement decreases. This suggests that the structure of the NW network could allow for partial impalement, hence preserving the reversibility, and that EW acts the same way as an external pressure. The most robust of our surfaces shows a threshold to impalement higher than 35 kPa, while most of the superhydrophobic surfaces tested so far have impalement thresholds smaller than 10 kPa.

引用

页码：11203 / 11208

页数：6

共 21 条

[1] Singular jets and bubbles in drop impact [J].

Bartolo, D ;

Josserand, C ;

Bonn, D .

PHYSICAL REVIEW LETTERS, 2006, 96 (12)

[2] Bouncing or sticky droplets:: Impalement transitions on superhydrophobic micropatterned surfaces [J].

Bartolo, D ;

Bouamrirene, F ;

Verneuil, É ;

Buguin, A ;

Silberzan, P ;

Moulinet, S .

EUROPHYSICS LETTERS, 2006, 74 (02) :299-305

[3] Towards optimization of patterned superhydrophobic surfaces [J].

Bhushan, Bharat ;

Nosonovsky, Michael ;

Jung, Yong Chae .

JOURNAL OF THE ROYAL SOCIETY INTERFACE, 2007, 4 (15) :643-648

[4] Wettability of porous surfaces. [J].

Cassie, ABD ;

Baxter, S .

TRANSACTIONS OF THE FARADAY SOCIETY, 1944, 40 :0546-0550

[5] Reversible electrowetting of vertically aligned superhydrophobic carbon nanofibers [J].

Dhindsa, Manjeet S. ;

Smith, Neil R. ;

Heikenfeld, Jason ;

Rack, Philip D. ;

Fowlkes, Jason D. ;

Doktycz, Mitchel J. ;

Melechko, Anatoli V. ;

Simpson, Micheal L. .

LANGMUIR, 2006, 22 (21) :9030-9034

[6] The "lotus effect" explained: Two reasons why two length scales of topography are important [J].

Gao, LC ;

McCarthy, TJ .

LANGMUIR, 2006, 22 (07) :2966-2967

[7] Electrowetting on superhydrophobic SU-8 patterned surfaces [J].

Herbertson, Dale L. ;

Evans, Carl R. ;

Shirtcliffe, Neil J. ;

McHale, Glen ;

Newton, Michael I. .

SENSORS AND ACTUATORS A-PHYSICAL, 2006, 130 :189-193

[8] From rolling ball to complete wetting: The dynamic tuning of liquids on nanostructured surfaces [J].

Krupenkin, TN ;

Taylor, JA ;

Schneider, TM ;

Yang, S .

LANGMUIR, 2004, 20 (10) :3824-3827

[9] The collapse transition on superhydrophobic surfaces [J].

Kusumaatmaja, H. ;

Blow, M. L. ;

Dupuis, A. ;

Yeomans, J. M. .

EPL, 2008, 81 (03)

[10] Superhydrophobic states [J].

Lafuma, A ;

Quéré, D .

NATURE MATERIALS, 2003, 2 (07) :457-460

← 1 2 3 →