Document Detail


Smart design of stripe-patterned gradient surfaces to control droplet motion.
MedLine Citation:
PMID:  21780836     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The motion of droplets under the influence of lithographically created anisotropic chemically defined patterns is described and discussed. The patterns employed in our experiments consist of stripes of alternating wettability: hydrophobic stripes are created via fluorinated self-assembled monolayers, and for hydrophilic stripes the SiO_2 substrate is used. The energy gradient required to induce motion of the droplets is created by varying the relative widths of the stripes in such a way that the fraction of hydrophilic area increases. The anisotropic patterns create a preferential direction for liquid spreading parallel to the stripes and confine motion in the perpendicular direction, giving rise to markedly higher velocities as compared to non-structured surface energy gradients. Consequently, the influence of the distinct pattern features on the overall motion as well as suggestions for the design improvements from an application point of view are discussed.
Authors:
Olesya Bliznyuk; H Patrick Jansen; E Stefan Kooij; Harold J W Zandvliet; Bene Poelsema
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-7-25
Journal Detail:
Title:  Langmuir : the ACS journal of surfaces and colloids     Volume:  -     ISSN:  1520-5827     ISO Abbreviation:  -     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-7-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882736     Medline TA:  Langmuir     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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