Document Detail

Extreme resistance of superhydrophobic surfaces to impalement: reversible electrowetting related to the impacting/bouncing drop test.
MedLine Citation:
PMID:  18729486     Owner:  NLM     Status:  PubMed-not-MEDLINE    
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.
P Brunet; F Lapierre; V Thomy; Y Coffinier; R Boukherroub
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-08-27
Journal Detail:
Title:  Langmuir : the ACS journal of surfaces and colloids     Volume:  24     ISSN:  0743-7463     ISO Abbreviation:  Langmuir     Publication Date:  2008 Oct 
Date Detail:
Created Date:  2008-10-03     Completed Date:  2008-10-28     Revised Date:  2009-05-14    
Medline Journal Info:
Nlm Unique ID:  9882736     Medline TA:  Langmuir     Country:  United States    
Other Details:
Languages:  eng     Pagination:  11203-8     Citation Subset:  -    
Laboratoire de Mecanique de Lille, UMR CNRS 8107, Bd. Paul Langevin, 59655 Villeneuve d'Ascq, France.
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MeSH Terms
Erratum In:
Langmuir. 2009 Mar 3;25(5):3321

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