A compact microfluidic gradient generator using passive pumping.

A compact microfluidic gradient generator using passive pumping.
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DOI:
10.1007/s10404-011-0908-0
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发表时间:
2012-05-01
影响因子:
2.8
通讯作者:
Li, Deyu
Li, Deyu
中科院分区:
工程技术3区
文献类型:
--
作者:
Gao, Yandong;Sun, Jiashu;Lin, Wan-Hsin;Webb, Donna J.;Li, Deyu

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Creating and maintaining a precise molecular gradient which is stable in space and time are essential to studies of chemotaxis. This paper describes a simple, compact, and user-friendly microfluidic device using a passive pumping method to drive the liquid flow to generate a stable concentration gradient. A fluidic circuit is designed to offset the effects of the pressure imbalance between the two inlets. After loading approximately the same amount of culture media containing different concentrations of a certain chemotactic agent into the two inlet reservoirs, a linear concentration gradient will be automatically and quickly established at the downstream. Our device takes advantage of passive pumping and is compact enough to fit into a Petri dish, which is an attractive feature to biologists. Furthermore, this microfluidic gradient generator offers a platform for a facile way of long-term imaging and analysis using high resolution microscopy.
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