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Title: Enhanced water permeability and tunable ion selectivity in subnanometer carbon nanotube porins [Ultra-high water permeability and tunable ion selectivity in sub-nm carbon nanotube porins]

Abstract

Fast water transport through carbon nanotube pores has raised the possibility to use them in the next generation of water treatment technologies. In this paper, we report that water permeability in 0.8-nanometer-diameter carbon nanotube porins (CNTPs), which confine water down to a single-file chain, exceeds that of biological water transporters and of wider CNT pores by an order of magnitude. Intermolecular hydrogen-bond rearrangement, required for entry into the nanotube, dominates the energy barrier and can be manipulated to enhance water transport rates. CNTPs block anion transport, even at salinities that exceed seawater levels, and their ion selectivity can be tuned to configure them into switchable ionic diodes. Lastly, these properties make CNTPs a promising material for developing membrane separation technologies.

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [5]; ORCiD logo [6]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Biology and Biotechnology Division, Physical and Life Sciences Directorate
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Biology and Biotechnology Division, Physical and Life Sciences Directorate; Northeastern Univ., Boston, MA (United States). Physics Department
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Biology and Biotechnology Division, Physical and Life Sciences Directorate; University of California, Merced, CA (United States). School of Natural Sciences
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Materials Science Division, Physical and Life Sciences Directorate
  5. Northeastern Univ., Boston, MA (United States). Physics Department
  6. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Biology and Biotechnology Division, Physical and Life Sciences Directorate; University of California, Merced, CA (United States). School of Natural Sciences
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1434817
Alternate Identifier(s):
OSTI ID: 1466168
Report Number(s):
LLNL-JRNL-725791
Journal ID: ISSN 0036-8075; 875469
Grant/Contract Number:  
AC52-07NA27344; AC02-05CH11231
Resource Type:
Published Article
Journal Name:
Science
Additional Journal Information:
Journal Volume: 357; Journal Issue: 6353; Journal ID: ISSN 0036-8075
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Tunuguntla, Ramya H., Henley, Robert Y., Yao, Yun-Chiao, Pham, Tuan Anh, Wanunu, Meni, and Noy, Aleksandr. Enhanced water permeability and tunable ion selectivity in subnanometer carbon nanotube porins [Ultra-high water permeability and tunable ion selectivity in sub-nm carbon nanotube porins]. United States: N. p., 2017. Web. doi:10.1126/science.aan2438.
Tunuguntla, Ramya H., Henley, Robert Y., Yao, Yun-Chiao, Pham, Tuan Anh, Wanunu, Meni, & Noy, Aleksandr. Enhanced water permeability and tunable ion selectivity in subnanometer carbon nanotube porins [Ultra-high water permeability and tunable ion selectivity in sub-nm carbon nanotube porins]. United States. doi:10.1126/science.aan2438.
Tunuguntla, Ramya H., Henley, Robert Y., Yao, Yun-Chiao, Pham, Tuan Anh, Wanunu, Meni, and Noy, Aleksandr. Thu . "Enhanced water permeability and tunable ion selectivity in subnanometer carbon nanotube porins [Ultra-high water permeability and tunable ion selectivity in sub-nm carbon nanotube porins]". United States. doi:10.1126/science.aan2438.
@article{osti_1434817,
title = {Enhanced water permeability and tunable ion selectivity in subnanometer carbon nanotube porins [Ultra-high water permeability and tunable ion selectivity in sub-nm carbon nanotube porins]},
author = {Tunuguntla, Ramya H. and Henley, Robert Y. and Yao, Yun-Chiao and Pham, Tuan Anh and Wanunu, Meni and Noy, Aleksandr},
abstractNote = {Fast water transport through carbon nanotube pores has raised the possibility to use them in the next generation of water treatment technologies. In this paper, we report that water permeability in 0.8-nanometer-diameter carbon nanotube porins (CNTPs), which confine water down to a single-file chain, exceeds that of biological water transporters and of wider CNT pores by an order of magnitude. Intermolecular hydrogen-bond rearrangement, required for entry into the nanotube, dominates the energy barrier and can be manipulated to enhance water transport rates. CNTPs block anion transport, even at salinities that exceed seawater levels, and their ion selectivity can be tuned to configure them into switchable ionic diodes. Lastly, these properties make CNTPs a promising material for developing membrane separation technologies.},
doi = {10.1126/science.aan2438},
journal = {Science},
number = 6353,
volume = 357,
place = {United States},
year = {2017},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1126/science.aan2438

Citation Metrics:
Cited by: 90 works
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