期刊
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
卷 21, 期 2, 页码 443-450出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JMEMS.2011.2174421
关键词
Electrowetting-on-dielectric (EWOD); Galinstan; Galinstan contact angle; Galinstan oxidation; Galinstan surface tension; liquid-metal
类别
资金
- DARPA HERMIT
We have obtained interfacial properties of Galinstan, a nontoxic liquid-metal alloy, to help replace mercury in miniature devices. To prevent formation of an oxide skin that severely hinders the fluidic behavior of small Galinstan droplets and leads to inaccurate property data, we performed our experiments in a nitrogen-filled glove box. It was found that only if never exposed to oxygen levels above 1 part per million (ppm) would Galinstan droplets behave like a liquid. Two key properties were then investigated: contact angles and surface tension. Advancing and receding contact angles of Galinstan were measured from sessile droplets on various materials: for example, 146.8 degrees and 121.5 degrees, respectively, on glass. Surface tension was measured by the pendant-drop method to be 534.6 +/- 10.7 mN/m. All the measurements were done in nitrogen at 28 degrees C with oxygen and moisture levels below 0.5 ppm. To help design droplet-based microfluidic devices, we tested the response of Galinstan to electrowetting-on-dielectric actuation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据