Synthesis of bilayer composite nanomembranes with conductivity asymmetry |
| |
Authors: | L I Kravets S N Dmitriev V A Altynov V Satulu B Mitu G Dinescu |
| |
Institution: | 1.Joint Institute for Nuclear Research,Dubna,Russia;2.National Institute for Laser, Plasma, and Radiation Physics,Magurele, Bucharest,Romania |
| |
Abstract: | The structure and electrochemical properties of polyethylene terephthalate track membranes modified in acetylene plasma are
studied. It is found that polymer deposition on the track membrane surface using acetylene polymerization in plasma results
in the case of formation of a semipermeable layer covering pores in formation of a composite nanomembrane featuring asymmetry
of conductivity in solutions of electrolytes: a rectifying effect similar to that of a p-n junction in semiconductors. It is shown that the observed effect of conductivity asymmetry is caused by a significant decrease
in the diameter of pores in the plasma-deposited polymer layer and a change in the pore geometry, same as existence of an
interface between the initial membrane and polymer layer that have a different concentration of carboxyl groups in the surface
layer. The impedance spectroscopy method allowed obtaining information on ion transfer in the studied membranes. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|