Rectification of Nanopores at Surfaces

Optical rectification at semiconductor surfaces.

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...

Ion 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...

Current rectification by nanoparticle blocking in single cylindrical nanopores.

Blocking of a charged pore by an oppositely charged nanoparticle can support rectifying properties in a cylindrical nanopore, as opposed to the usual case of a fixed asymmetry in the pore geometry and charge distribution. We present here experimental data and model calculations to confirm this fundamental effect. The nanostructure imaging and the effects of nanoparticle concentration, pore radi...

Ion 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...