Electro-generation of single femtoliter- and picoliter-volume aqueous droplets in microfluidic systems

被引：70

作者：

He, MY ^{[1
]}

Kuo, JS ^{[1
]}

Chiu, DT ^{[1
]}

机构：

[1] Univ Washington, Dept Chem, Seattle, WA 98195 USA

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 03期

关键词：

D O I：

10.1063/1.1997280

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This letter presents a new method to generate individual femtoliter-to picoliter-volume aqueous droplets in oil using single voltage pulses. With high-speed imaging, we characterized the displacement of the water-oil interface as a function of the time and amplitude of the voltage pulse. At high voltages where jetting and droplet formation occurred, we observed the ratio of droplet-to-jet diameter to be similar to 1.84, which suggested Rayleigh instability as the primary mechanism responsible for droplet breakup. Droplets with volumes ranging from 14 fl to 8 pl were produced using this method. (c) 2005 American Institute of Physics.

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页数：3

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