Electrowetting-based microdrop tensiometer

被引：59
|
作者：
Banpurkar, Arun G. [1 ,2 ,3 ]
Nichols, Kevin P. [1 ,2 ]
Mugele, Frieder [1 ,2 ]
机构：
[1] Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands
[2] Univ Twente, IMPACT, NL-7500 AE Enschede, Netherlands
[3] Univ Pune, Ctr Adv Studies Mat Sci & Condensed Matter Phys, Dept Phys, Pune 411007, Maharashtra, India
来源：
LANGMUIR | 2008年 / 24卷 / 19期
关键词：
D O I：
10.1021/la801549p
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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.
引用
收藏
页码：10549 / 10551
页数：3
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