Extreme resistance of superhydrophobic ...
Document type :
Article dans une revue scientifique
DOI :
Title :
Extreme resistance of superhydrophobic surfaces to impalement : reversible electrowetting related to the impacting/bouncing drop test
Author(s) :
Brunet, P. [Auteur]
Lapierre, F. [Auteur]
Thomy, Vincent [Auteur]
Coffinier, Yannick [Auteur]
Boukherroub, Rabah [Auteur]
Lapierre, F. [Auteur]
Thomy, Vincent [Auteur]
Coffinier, Yannick [Auteur]
Boukherroub, Rabah [Auteur]
Journal title :
Langmuir
Pages :
11203-11208
Publisher :
American Chemical Society
Publication date :
2008
ISSN :
0743-7463
HAL domain(s) :
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Sciences de l'ingénieur [physics]/Micro et nanotechnologies/Microélectronique
Sciences de l'ingénieur [physics]/Micro et nanotechnologies/Microélectronique
English abstract : [en]
The paper reports on the comparison of the wetting properties of super-hydrophobic silicon nanowires (NWs), using drop impact impalement and electrowetting (EW) experiments. A correlation between the resistance to impalement ...
Show more >The paper reports on the comparison of the wetting properties of super-hydrophobic 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 (ii) the contact-angle hysteresis after impalement decreases. This suggests that the structure of the NWs 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 show a threshold to impalement higher than 35 kPa, while most of the super-hydrophobic surfaces tested so far have impalement threshold smaller than 10 kPaShow less >
Show more >The paper reports on the comparison of the wetting properties of super-hydrophobic 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 (ii) the contact-angle hysteresis after impalement decreases. This suggests that the structure of the NWs 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 show a threshold to impalement higher than 35 kPa, while most of the super-hydrophobic surfaces tested so far have impalement threshold smaller than 10 kPaShow less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Non spécifiée
Popular science :
Non
Source :
Files
- http://arxiv.org/pdf/0809.0820
- Open access
- Access the document
- https://hal.archives-ouvertes.fr/hal-00356899/document
- Open access
- Access the document