Electrowetting-based microdrop tensiometer

We performed electrowetting (EW) contact angle measurements to determine the interfacial tension between aqueous drops laden with various inorganic and organic solutes and various ambient oils. Using low frequency AC voltage, we obtained interfacial tensions from 5 to 72 mJ/m 2, in close agreement w...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 24(2008), 19 vom: 07. Okt., Seite 10549-51
1. Verfasser: Banpurkar, Arun G (VerfasserIn)
Weitere Verfasser: Nichols, Kevin P, Mugele, Frieder
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2008
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
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520 |a We performed electrowetting (EW) contact angle measurements to determine the interfacial tension between aqueous drops laden with various inorganic and organic solutes and various ambient oils. Using low frequency AC voltage, we obtained interfacial tensions from 5 to 72 mJ/m 2, in close agreement with macroscopic tensiometry for drop volumes between 20 and 2000 nL. In addition to the conventional EW geometry, we demonstrate the possibility of performing "contact-less" measurements without any loss of accuracy using interdigitated coplanar electrodes 
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700 1 |a Mugele, Frieder  |e verfasserin  |4 aut 
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