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Vol. 27 No. 6 (2015): Vol 27 Issue 6

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Electroosmosis-Driven Polystyrene Particles Transport Across Polymer Membrane Containing a Conical-Shaped Nanopore

https://doi.org/10.14233/ajchem.2015.17828
X.R. Zhu
Henan Key Laboratory of Ion Beam Bioengineering, Physical Engineering College, Zhenzhou University, Zhengzhou 450052, P.R. China
L. Wang
State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, P.R. China
C.M. Wang
State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, P.R. China
Z. Jiao
Henan Key Laboratory of Ion Beam Bioengineering, Physical Engineering College, Zhenzhou University, Zhengzhou 450052, P.R. China
W.D. Wang
Henan Key Laboratory of Ion Beam Bioengineering, Physical Engineering College, Zhenzhou University, Zhengzhou 450052, P.R. China
G.Y. Qin
Henan Key Laboratory of Ion Beam Bioengineering, Physical Engineering College, Zhenzhou University, Zhengzhou 450052, P.R. China

Corresponding Author(s) : X.R. Zhu

xiaozhu2004057@126.com

Asian Journal of Chemistry, Vol. 27 No. 6 (2015): Vol 27 Issue 6

Abstract

This report presents a study of translocation of the charged polystyrene nanoparticles across two nanopores separately (a double conical-shaped and a single conical-shaped) contained within a polyimide (Kapton) film using the coulter Counter principle (or “resistive-pulse” method) in which the time-dependent current is recorded as the nanoparticle is driven across the membrane. The nanopores were fabricated by the track-etched method. Under the action of the electroosmotic, the particles transports across the nanopore and results in a direction-dependent and asymmetric triangular-shaped resistive pulse. When applied voltage was low, the transportation current decreased. With the increasing of the voltage, the transmembrane current decreased and increase alternately, the increase of current was less and the decrease of current was more. At higher voltage the current decreased. We contribute these to the change of the electroosmotic flow.

Keywords

Nanopore Electroosmotic flow Polystyrene particles Ion transport
Zhu, X., Wang, L., Wang, C., Jiao, Z., Wang, W., & Qin, G. (2015). Electroosmosis-Driven Polystyrene Particles Transport Across Polymer Membrane Containing a Conical-Shaped Nanopore. Asian Journal of Chemistry, 27(6), 2157–2160. https://doi.org/10.14233/ajchem.2015.17828
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