نتایج جستجو برای: asymmetric nanopores
تعداد نتایج: 68101 فیلتر نتایج به سال:
Ion transport through single-cation selective nanopores in thin polymer foils is examined experimentally and described by a diffusional model based on the reduction of the three-dimensional Smoluchowski equation into a one-dimensional equation of Fick–Jacobs type. The model enables semiquantitative predictions of the transport properties of nanopores of various shapes and surface charge propert...
Ultrathin ZIF-8 membranes with a thickness of around 200 nm were prepared by chemical vapour modification of surface chemistry and nanopores of an asymmetric bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO) substrate. The resulting ZIF-8 membranes exhibited exceptional H2 permeance as high as 2.05 × 10(-6) mol m(-2) s(-1) Pa(-1) with high H2/N2 and H2/CO2 selectivities (9.7 and 12....
It has been suggested that microtubules and other cytoskeletal filaments may act as electrical transmission lines. An electrical circuit model of the microtubule is constructed incorporating features of its cylindrical structure with nanopores in its walls. This model is used to study how ionic conductance along the lumen is affected by flux through the nanopores, both with and without an exter...
The concept is easy to understand: A membrane with a single pore of appropriate size (diameter comparable to that of the molecule to detect) separates the two halves of an electrochemical cell. The cell is filled with an electrolyte, and a voltage is applied across the membrane. In the absence of any biomolecules in the solution, a steady flow of ions is measured as a constant current. As soon ...
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