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Water-ion permselectivity of narrow-diameter carbon nanotubes

Carbon nanotube (CNT) pores, which mimic the structure of the aquaporin channels, support extremely high water transport rates that make them strong candidates for building artificial water channels and high-performance membranes. Here, we measure water and ion permeation through 0.8-nm-diameter CNT...

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Autores principales: Li, Yuhao, Li, Zhongwu, Aydin, Fikret, Quan, Jana, Chen, Xi, Yao, Yun-Chiao, Zhan, Cheng, Chen, Yunfei, Pham, Tuan Anh, Noy, Aleksandr
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7494338/
https://www.ncbi.nlm.nih.gov/pubmed/32938679
http://dx.doi.org/10.1126/sciadv.aba9966
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author Li, Yuhao
Li, Zhongwu
Aydin, Fikret
Quan, Jana
Chen, Xi
Yao, Yun-Chiao
Zhan, Cheng
Chen, Yunfei
Pham, Tuan Anh
Noy, Aleksandr
author_facet Li, Yuhao
Li, Zhongwu
Aydin, Fikret
Quan, Jana
Chen, Xi
Yao, Yun-Chiao
Zhan, Cheng
Chen, Yunfei
Pham, Tuan Anh
Noy, Aleksandr
author_sort Li, Yuhao
collection PubMed
description Carbon nanotube (CNT) pores, which mimic the structure of the aquaporin channels, support extremely high water transport rates that make them strong candidates for building artificial water channels and high-performance membranes. Here, we measure water and ion permeation through 0.8-nm-diameter CNT porins (CNTPs)—short CNT segments embedded in lipid membranes—under optimized experimental conditions. Measured activation energy of water transport through the CNTPs agrees with the barrier values typical for single-file water transport. Well-tempered metadynamics simulations of water transport in CNTPs also report similar activation energy values and provide molecular-scale details of the mechanism for water entry into these channels. CNTPs strongly reject chloride ions and show water-salt permselectivity values comparable to those of commercial desalination membranes.
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spelling pubmed-74943382020-09-23 Water-ion permselectivity of narrow-diameter carbon nanotubes Li, Yuhao Li, Zhongwu Aydin, Fikret Quan, Jana Chen, Xi Yao, Yun-Chiao Zhan, Cheng Chen, Yunfei Pham, Tuan Anh Noy, Aleksandr Sci Adv Research Articles Carbon nanotube (CNT) pores, which mimic the structure of the aquaporin channels, support extremely high water transport rates that make them strong candidates for building artificial water channels and high-performance membranes. Here, we measure water and ion permeation through 0.8-nm-diameter CNT porins (CNTPs)—short CNT segments embedded in lipid membranes—under optimized experimental conditions. Measured activation energy of water transport through the CNTPs agrees with the barrier values typical for single-file water transport. Well-tempered metadynamics simulations of water transport in CNTPs also report similar activation energy values and provide molecular-scale details of the mechanism for water entry into these channels. CNTPs strongly reject chloride ions and show water-salt permselectivity values comparable to those of commercial desalination membranes. American Association for the Advancement of Science 2020-09-16 /pmc/articles/PMC7494338/ /pubmed/32938679 http://dx.doi.org/10.1126/sciadv.aba9966 Text en Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/ https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Li, Yuhao
Li, Zhongwu
Aydin, Fikret
Quan, Jana
Chen, Xi
Yao, Yun-Chiao
Zhan, Cheng
Chen, Yunfei
Pham, Tuan Anh
Noy, Aleksandr
Water-ion permselectivity of narrow-diameter carbon nanotubes
title Water-ion permselectivity of narrow-diameter carbon nanotubes
title_full Water-ion permselectivity of narrow-diameter carbon nanotubes
title_fullStr Water-ion permselectivity of narrow-diameter carbon nanotubes
title_full_unstemmed Water-ion permselectivity of narrow-diameter carbon nanotubes
title_short Water-ion permselectivity of narrow-diameter carbon nanotubes
title_sort water-ion permselectivity of narrow-diameter carbon nanotubes
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7494338/
https://www.ncbi.nlm.nih.gov/pubmed/32938679
http://dx.doi.org/10.1126/sciadv.aba9966
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