Electroosmotic flow rectification in pyramidal-pore mica membranes

Journal of the American Chemical Society
Pu JinCharles R Martin

Abstract

We demonstrate here a new electrokinetic phenomenon, Electroosmotic flow (EOF) rectification, in synthetic membranes containing asymmetric pores. Mica membranes with pyramidally shaped pores prepared by the track-etch method were used. EOF was driven through these membranes by using an electrode in solutions on either side to pass a constant ionic current through the pores. The velocity of EOF depends on the polarity of the current. A high EOF velocity is obtained when the polarity is such that EOF is driven from the larger base opening to the smaller tip opening of the pore. A smaller EOF velocity is obtained when the polarity is reversed such that EOF goes from tip to base. We show that this rectified EOF phenomenon is the result of ion current-rectification observed in such asymmetric-pore membranes.

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Citations

Oct 16, 2013·Nano Letters·Nadanai LaohakunakornUlrich F Keyser
May 28, 2016·Analytical Chemistry·Andrew R KnellerStephen C Jacobson
Oct 1, 2016·Accounts of Chemical Research·Wen-Jie LanHenry S White
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Jul 15, 2015·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Hung-Chun YehRuey-Jen Yang
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Aug 6, 2010·The Journal of Physical Chemistry. B·Anthony SzymczykBéatrice Balannec
Jul 29, 2021·ACS Nano·Siyun ZhangHaibing Li
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Aug 2, 2011·Journal of the American Chemical Society·Wen-Jie LanHenry S White
May 25, 2018·Analytical Chemistry·Xiaojian WuCharles R Martin
Oct 15, 2021·Nanoscale·Jianing DongZhong-Qun Tian

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