Electroosmotic flow rectification in conical nanopores
نویسندگان
چکیده
منابع مشابه
Rectification in synthetic conical nanopores
The theoretical description of ionic transport processes in nanoporous materials is a very interesting topic, since these materials have promising technological applications e.g. in sensing and filtration of molecules with size comparable to the pore diameter, and especially single pores may serve as model systems for biological ion channels. By the track-etching method [1], it is possible to p...
متن کاملInfluence of electroosmotic flow on the ionic current rectification in a pH-regulated, conical nanopore.
The ionic current rectification (ICR) is studied theoretically by considering a pH-regulated, conical nanopore. In particular, the effect of electroosmotic flow (EOF), which was often neglected in previous studies, is investigated by solving a set of coupled Poisson, Nernst-Planck, and Navier-Stokes equations. The behaviors of ICR under various conditions are examined by varying solution pH, bu...
متن کاملElectroosmotic Flow Reversal Outside Glass Nanopores
We report observations of a striking reversal in the direction of electroosmotic flow (EOF) outside a conical glass nanopore as a function of salt concentration. At high ionic strengths (>100 mM), we observe EOF in the expected direction as predicted by classical electrokinetic theory, while at low salt concentrations (<1 mM) the direction of the flow is reversed. The critical crossover salt co...
متن کاملIon Current Rectification and Rectification Inversion in Conical Nanopores: A Perm-selective View Electronic Supplementary Information
proving the validity of the present numerical approach. The results were also compared to the FEM simulations made by White et al. The ion current rectification in the pore of 10 μm length and half-cone angle of 12°, filled with 1 mM KCl solution was simulated. In this case the rectification ratio r(E) 35 is 1.39, while White et al report 1.38. The tiny difference in the obtained result is prob...
متن کاملIon current rectification and rectification inversion in conical nanopores: a perm-selective view.
Ionic transport in charged conical nanopores is known to give rise to ion current rectification. The present study shows that the rectification direction can be inverted when using electrolyte solutions at very low ionic strengths. To elucidate these phenomena, electroneutral conical nanopores containing a perm-selective region at the tip have been investigated and shown to behave like classica...
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ژورنال
عنوان ژورنال: Nanotechnology
سال: 2015
ISSN: 0957-4484,1361-6528
DOI: 10.1088/0957-4484/26/27/275202