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Ionic Transport in Microhole Fluidic Diodes Based on Asymmetric Ionomer Film Deposits
Author(s) -
Mathwig Klaus,
Aaronson Barak D. B.,
Marken Frank
Publication year - 2018
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201700464
Subject(s) - ionomer , materials science , ionic bonding , rectification , nafion , diode , membrane , fluidics , electrolyte , nanotechnology , polymer , optoelectronics , chemical engineering , ion , composite material , chemistry , electrochemistry , voltage , electrode , organic chemistry , copolymer , electrical engineering , biochemistry , engineering
Microhole fluidic ionic diodes based on asymmetric deposits of charged ionomer membranes (e. g. Nafion or polymers of intrinsic microporosity) on microhole supports yield high rectification ratios for ionic transport. They are fabricated without the need for complex micro‐ or nanostructuring, and show potential for future applications in desalination and biosensing. Here, we propose an explanation for the functional principle for this type of materials‐based ionic diode. A predictive computational model for ionic diode switching is based on finite element analysis. It is employed to determine the influence of diode geometry as well as type and concentration of aqueous electrolyte on the rectification behavior.