Publication

Switching Anionic and Cationic Semi-Permeability in Partially Hydrolyzed Polyacrylonitrile: A pH-Tunable Ionic Rectifier

Tshwenya, L., Marken, F., Mathwig, K. & Arotiba, O. A., 2020, In : ACS Applied Materials & Interfaces. 12, 2, p. 3214-3224 11 p.

Research output: Contribution to journalArticleAcademicpeer-review

APA

Tshwenya, L., Marken, F., Mathwig, K., & Arotiba, O. A. (2020). Switching Anionic and Cationic Semi-Permeability in Partially Hydrolyzed Polyacrylonitrile: A pH-Tunable Ionic Rectifier. ACS Applied Materials & Interfaces, 12(2), 3214-3224. https://doi.org/10.1021/acsami.9b18583

Author

Tshwenya, Luthando ; Marken, Frank ; Mathwig, Klaus ; Arotiba, Omotayo A. / Switching Anionic and Cationic Semi-Permeability in Partially Hydrolyzed Polyacrylonitrile : A pH-Tunable Ionic Rectifier. In: ACS Applied Materials & Interfaces. 2020 ; Vol. 12, No. 2. pp. 3214-3224.

Harvard

Tshwenya, L, Marken, F, Mathwig, K & Arotiba, OA 2020, 'Switching Anionic and Cationic Semi-Permeability in Partially Hydrolyzed Polyacrylonitrile: A pH-Tunable Ionic Rectifier', ACS Applied Materials & Interfaces, vol. 12, no. 2, pp. 3214-3224. https://doi.org/10.1021/acsami.9b18583

Standard

Switching Anionic and Cationic Semi-Permeability in Partially Hydrolyzed Polyacrylonitrile : A pH-Tunable Ionic Rectifier. / Tshwenya, Luthando; Marken, Frank; Mathwig, Klaus; Arotiba, Omotayo A.

In: ACS Applied Materials & Interfaces, Vol. 12, No. 2, 2020, p. 3214-3224.

Research output: Contribution to journalArticleAcademicpeer-review

Vancouver

Tshwenya L, Marken F, Mathwig K, Arotiba OA. Switching Anionic and Cationic Semi-Permeability in Partially Hydrolyzed Polyacrylonitrile: A pH-Tunable Ionic Rectifier. ACS Applied Materials & Interfaces. 2020;12(2):3214-3224. https://doi.org/10.1021/acsami.9b18583


BibTeX

@article{d7832dfbd50a41ef8246c50903872c14,
title = "Switching Anionic and Cationic Semi-Permeability in Partially Hydrolyzed Polyacrylonitrile: A pH-Tunable Ionic Rectifier",
abstract = "Membrane materials with semi-permeability for anions or for cations are of interest in electrochemical and nanofluidic separation and purification technologies. In this study, partially hydrolyzed poly-acrylonitrile (phPAN) is investigated as a pH-switchable anion/cation conductor. When switching from anionic to cationic semi-permeability, also the ionic current rectification effect switches for phPAN materials deposited asymmetrically onto a 5, 10, 20, or 40 µm diameter microhole in a 6 m thick polyethylene-terephthalate (PET) film substrate. Therefore, ionic rectifier behavior can be tuned and used to monitor and characterize semi-permeability. Effects of electrolyte type and concentration, and pH (relative to the zeta potential at approximately 3.1) are investigated by voltammetry, chronoamperometry, and impedance spectroscopy. A computational model provides good qualitative agreement with observed electrolyte concentration data. High rectification effects are observed for both cations (pH > 3.1) and anions (pH < 3.1), but only at relatively low ionic strengths.",
author = "Luthando Tshwenya and Frank Marken and Klaus Mathwig and Arotiba, {Omotayo A}",
year = "2020",
doi = "10.1021/acsami.9b18583",
language = "English",
volume = "12",
pages = "3214--3224",
journal = "ACS Applied Materials & Interfaces",
issn = "1944-8244",
publisher = "AMER CHEMICAL SOC",
number = "2",

}

RIS

TY - JOUR

T1 - Switching Anionic and Cationic Semi-Permeability in Partially Hydrolyzed Polyacrylonitrile

T2 - A pH-Tunable Ionic Rectifier

AU - Tshwenya, Luthando

AU - Marken, Frank

AU - Mathwig, Klaus

AU - Arotiba, Omotayo A

PY - 2020

Y1 - 2020

N2 - Membrane materials with semi-permeability for anions or for cations are of interest in electrochemical and nanofluidic separation and purification technologies. In this study, partially hydrolyzed poly-acrylonitrile (phPAN) is investigated as a pH-switchable anion/cation conductor. When switching from anionic to cationic semi-permeability, also the ionic current rectification effect switches for phPAN materials deposited asymmetrically onto a 5, 10, 20, or 40 µm diameter microhole in a 6 m thick polyethylene-terephthalate (PET) film substrate. Therefore, ionic rectifier behavior can be tuned and used to monitor and characterize semi-permeability. Effects of electrolyte type and concentration, and pH (relative to the zeta potential at approximately 3.1) are investigated by voltammetry, chronoamperometry, and impedance spectroscopy. A computational model provides good qualitative agreement with observed electrolyte concentration data. High rectification effects are observed for both cations (pH > 3.1) and anions (pH < 3.1), but only at relatively low ionic strengths.

AB - Membrane materials with semi-permeability for anions or for cations are of interest in electrochemical and nanofluidic separation and purification technologies. In this study, partially hydrolyzed poly-acrylonitrile (phPAN) is investigated as a pH-switchable anion/cation conductor. When switching from anionic to cationic semi-permeability, also the ionic current rectification effect switches for phPAN materials deposited asymmetrically onto a 5, 10, 20, or 40 µm diameter microhole in a 6 m thick polyethylene-terephthalate (PET) film substrate. Therefore, ionic rectifier behavior can be tuned and used to monitor and characterize semi-permeability. Effects of electrolyte type and concentration, and pH (relative to the zeta potential at approximately 3.1) are investigated by voltammetry, chronoamperometry, and impedance spectroscopy. A computational model provides good qualitative agreement with observed electrolyte concentration data. High rectification effects are observed for both cations (pH > 3.1) and anions (pH < 3.1), but only at relatively low ionic strengths.

U2 - 10.1021/acsami.9b18583

DO - 10.1021/acsami.9b18583

M3 - Article

VL - 12

SP - 3214

EP - 3224

JO - ACS Applied Materials & Interfaces

JF - ACS Applied Materials & Interfaces

SN - 1944-8244

IS - 2

ER -

ID: 111363962