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Understanding Transient Ionic Diode Currents and Impedance Responses for Aquivion-Coated Microholes
[Image: see text] Ionic diode based devices or circuits can be applied, for example, in electroosmotic pumps or in desalination processes. Aquivion ionomer coated asymmetrically over a Teflon film (5 μm thickness) with a laser-drilled microhole (approximately 10 μm diameter) gives a cationic diode w...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2023
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10450689/ https://www.ncbi.nlm.nih.gov/pubmed/37567567 http://dx.doi.org/10.1021/acsami.3c08543 |
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author | Carneiro-Neto, Evaldo Batista Li, Zhongkai Pereira, Ernesto Mathwig, Klaus Fletcher, Philip J. Marken, Frank |
author_facet | Carneiro-Neto, Evaldo Batista Li, Zhongkai Pereira, Ernesto Mathwig, Klaus Fletcher, Philip J. Marken, Frank |
author_sort | Carneiro-Neto, Evaldo Batista |
collection | PubMed |
description | [Image: see text] Ionic diode based devices or circuits can be applied, for example, in electroosmotic pumps or in desalination processes. Aquivion ionomer coated asymmetrically over a Teflon film (5 μm thickness) with a laser-drilled microhole (approximately 10 μm diameter) gives a cationic diode with a rectification ratio of typically 10–20 (measured in 0.01 M NaCl with ±0.3 V applied bias). Steady state voltammetry, chronoamperometry, and electrochemical impedance spectroscopy data are employed to characterize the ionic diode performance parameters. Next, a COMSOL 6.0 finite element model is employed to quantitatively assess/compare transient phenomena and to extract mechanistic information by comparison with experimental data. The experimental diode time constant and diode switching process associated with a distorted semicircle (with a typical diode switching frequency of 10 Hz) in the Nyquist plot are reproduced by computer simulation and rationalized in terms of microhole diffusion–migration times. Fundamental understanding and modeling of the ionic diode switching process can be exploited in the rational/optimized design of new improved devices. |
format | Online Article Text |
id | pubmed-10450689 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-104506892023-08-26 Understanding Transient Ionic Diode Currents and Impedance Responses for Aquivion-Coated Microholes Carneiro-Neto, Evaldo Batista Li, Zhongkai Pereira, Ernesto Mathwig, Klaus Fletcher, Philip J. Marken, Frank ACS Appl Mater Interfaces [Image: see text] Ionic diode based devices or circuits can be applied, for example, in electroosmotic pumps or in desalination processes. Aquivion ionomer coated asymmetrically over a Teflon film (5 μm thickness) with a laser-drilled microhole (approximately 10 μm diameter) gives a cationic diode with a rectification ratio of typically 10–20 (measured in 0.01 M NaCl with ±0.3 V applied bias). Steady state voltammetry, chronoamperometry, and electrochemical impedance spectroscopy data are employed to characterize the ionic diode performance parameters. Next, a COMSOL 6.0 finite element model is employed to quantitatively assess/compare transient phenomena and to extract mechanistic information by comparison with experimental data. The experimental diode time constant and diode switching process associated with a distorted semicircle (with a typical diode switching frequency of 10 Hz) in the Nyquist plot are reproduced by computer simulation and rationalized in terms of microhole diffusion–migration times. Fundamental understanding and modeling of the ionic diode switching process can be exploited in the rational/optimized design of new improved devices. American Chemical Society 2023-08-11 /pmc/articles/PMC10450689/ /pubmed/37567567 http://dx.doi.org/10.1021/acsami.3c08543 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Carneiro-Neto, Evaldo Batista Li, Zhongkai Pereira, Ernesto Mathwig, Klaus Fletcher, Philip J. Marken, Frank Understanding Transient Ionic Diode Currents and Impedance Responses for Aquivion-Coated Microholes |
title | Understanding Transient
Ionic Diode Currents and Impedance
Responses for Aquivion-Coated Microholes |
title_full | Understanding Transient
Ionic Diode Currents and Impedance
Responses for Aquivion-Coated Microholes |
title_fullStr | Understanding Transient
Ionic Diode Currents and Impedance
Responses for Aquivion-Coated Microholes |
title_full_unstemmed | Understanding Transient
Ionic Diode Currents and Impedance
Responses for Aquivion-Coated Microholes |
title_short | Understanding Transient
Ionic Diode Currents and Impedance
Responses for Aquivion-Coated Microholes |
title_sort | understanding transient
ionic diode currents and impedance
responses for aquivion-coated microholes |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10450689/ https://www.ncbi.nlm.nih.gov/pubmed/37567567 http://dx.doi.org/10.1021/acsami.3c08543 |
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