Asymmetric Spectral Characteristic of Ion Currents 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...
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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...
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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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Herein we report a theoretical study of diode-like behavior of negatively charged (e.g., glass or silica) nanopores at different potential scan rates (1-1000 V·s(-1)). Finite element simulations were used to determine current-voltage characteristics of conical nanopores at various electrolyte concentrations. This study demonstrates that significant changes in rectification behavior can be obser...
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Currently, researchers are deeply involved in the field of nanopore technology due to its wide range of applications. Nanopores have been used for the detection and analysis of a variety of analytes, proteins, small organic molecules and metal ions [1-2]. So it becomes crucial to modify the chemistry of the nanopore walls to achieve desired interactions with molecules of interest. Single conica...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 2009
ISSN: 0006-3495
DOI: 10.1016/j.bpj.2008.12.3839