Nafion Film Based Micro-nanofluidic Device for Concurrent DNA Preconcentration and Separation in Free Solution.

Nafion Film Based Micro-nanofluidic Device for Concurrent DNA Preconcentration and Separation in Free Solution.
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DOI:
10.1007/s10404-014-1357-3
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发表时间:
2014-10-01
影响因子:
2.8
通讯作者:
Pant, Kapil
Pant, Kapil
中科院分区:
工程技术3区
文献类型:
--
作者:
Song, Hongjun;Wang, Yi;Garson, Charles;Pant, Kapil

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本文提出了一种基于Nafion膜的微纳流控装置,用于DNA的同时富集和分离。该装置的原理是基于(a)在Nafion膜中的微通道和纳米通道的接合处的离子浓度极化现象以形成作用于DNA的相反的电泳力和电渗力,以及(B)末端标记的自由溶液电泳以利用电荷质量比进行分子区分的组合。实验成功地证明了在240 s内同时进行的游离溶液中的DNA混合物的预浓缩和分离,产生高达1,150 X的浓缩比和1.85的分离分辨率。研究了外加电场对膜分离性能的影响。该设备可用作关键的样品制备元件,与微或纳米流体传感器结合使用,以实现microTAS功能。
This paper presents a Nafion film based micro-nanofluidic device for concurrent DNA preconcentration and separation. The principle of the device is based on the combination of (a) ion concentration polarization phenomenon at the junction of the microchannel and the nanochannels in the Nafion film to form opposing electrophoretic and electroosmotic forces acting on the DNAs, and (b) end-labeled free solution electrophoresis to harness the charge-to-mass ratio for molecular differentiation. The experiments successfully demonstrated concurrent preconcentration and separation of DNA mixture in free solution within 240s, yielding concentration ratios up to 1,150X and separation resolution of 1.85. The effect of applied electric field on the concentration and separation performance was also investigated. The device can be used as a key sample preparation element in conjunction with micro- or nano-fluidic sensors for microTAS functionality.
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期刊: Langmuir : the ACS journal of surfaces and colloids
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