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Highly selective ionic transport through subnanometer pores in polymer films

Wen, Qi ; Yan, Dongxiao ; Liu, Feng ; Wang, Mao ; Ling, Yun ; Wang, Pengfei ; Kluth, Patrick ; Schauries, Daniel ; Trautmann, Christina ; Apel, Pavel ; Guo, Wei ; Xiao, Guoqing ; Liu, Jie ; Xue, Jianming ; Wang, Yugang (2016)
Highly selective ionic transport through subnanometer pores in polymer films.
In: Advanced Functional Materials, 26 (32)
doi: 10.1002/adfm.201601689
Article, Bibliographie

Abstract

Novel transport phenomena through nanopores are expected to emerge as their diameters approach subnanometer scales. However, it has been challenging to explore such a regime experimentally. Here, this study reports on polymer subnanometer pores exhibiting unique selective ionic transport. 12 μm long, parallel oriented polymer nanopores are fabricated in polyethylene terephthalate (PET) films by irradiation with GeV heavy ions and subsequent 3 h exposure to UV radiation. These nanopores show ionic transport selectivity spanning more than 6 orders of magnitude: the order of the transport rate is Li+>Na+>K+>Cs+>>Mg2+>Ca2+>Ba2+, and heavy metal ions such as Cd2+ and anions are blocked. The transport can be switched off with a sharp transition by decreasing the pH value of the electrolyte. Structural measurements and molecular dynamics simulations suggest that the ionic transport is attributed to negatively charged nanopores with pore radii of ≈0.3 nm, and the selectivity is associated with the dehydration effect.

Item Type: Article
Erschienen: 2016
Creators: Wen, Qi ; Yan, Dongxiao ; Liu, Feng ; Wang, Mao ; Ling, Yun ; Wang, Pengfei ; Kluth, Patrick ; Schauries, Daniel ; Trautmann, Christina ; Apel, Pavel ; Guo, Wei ; Xiao, Guoqing ; Liu, Jie ; Xue, Jianming ; Wang, Yugang
Type of entry: Bibliographie
Title: Highly selective ionic transport through subnanometer pores in polymer films
Language: English
Date: 23 August 2016
Publisher: Wiley-VCH
Journal or Publication Title: Advanced Functional Materials
Volume of the journal: 26
Issue Number: 32
DOI: 10.1002/adfm.201601689
Abstract:

Novel transport phenomena through nanopores are expected to emerge as their diameters approach subnanometer scales. However, it has been challenging to explore such a regime experimentally. Here, this study reports on polymer subnanometer pores exhibiting unique selective ionic transport. 12 μm long, parallel oriented polymer nanopores are fabricated in polyethylene terephthalate (PET) films by irradiation with GeV heavy ions and subsequent 3 h exposure to UV radiation. These nanopores show ionic transport selectivity spanning more than 6 orders of magnitude: the order of the transport rate is Li+>Na+>K+>Cs+>>Mg2+>Ca2+>Ba2+, and heavy metal ions such as Cd2+ and anions are blocked. The transport can be switched off with a sharp transition by decreasing the pH value of the electrolyte. Structural measurements and molecular dynamics simulations suggest that the ionic transport is attributed to negatively charged nanopores with pore radii of ≈0.3 nm, and the selectivity is associated with the dehydration effect.

Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Ion-Beam-Modified Materials
Date Deposited: 11 Mar 2024 13:24
Last Modified: 11 Mar 2024 13:24
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