Passive Microfluidic Control of Two Merging Streams by Capillarity and Relative Flow Resistance
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- 作者：Sung-Jin Kim ; Yong Taik Lim ; Haesik Yang ; Yong Beom Shin ; Kyuwon Kim ; Dae-Sik Lee ; Se Ho Park ; and Youn Tae Kim
- 刊名：Analytical Chemistry
- 出版年：2005
- 出版时间：October 1, 2005
- 年：2005
- 卷：77
- 期：19
- 页码：6494 - 6499
- 全文大小：520K
- 年卷期：v.77,no.19(October 1, 2005)
- ISSN：1520-6882
文摘
In the progress of microfluidic devices, a simple andprecise control of multiple streams has been essential forcomplex microfluidic networks. Consequently, microfluidic devices, which have a simple structure, typicallyuse external energy sources to control the multiplestreams. Here, we propose a pure passive scheme thatuses capillarity without using external force or externalregulation to control the merging of two streams and evento regulate their volumetric flow rate (VFR). We accomplish this process by controlling the geometry of twoinlets and a junction, and by regulating the hydrophilicityof a substrate. Additionally, we use the relative flowresistance to control the VFR ratio of the merged twostreams. Our results will significantly simplify the controlof multiple streams without sacrificing precision.