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Water friction in nanofluidic channels made from two-dimensional crystals
Keerthi, Ashok Goutham, Solleti You, Yi Iamprasertkun, Pawin; orcid: 0000-0001-8950-3330 Dryfe, Robert A. W.; orcid: 0000-0002-9335-4451 Geim, Andre K.; orcid: 0000-0003-2861-8331 Radha, Boya; orcid: 0000-0003-1345-7029; email: radha.boya@manchester.ac.uk
Keerthi, Ashok
Goutham, Solleti
You, Yi
Iamprasertkun, Pawin; orcid: 0000-0001-8950-3330
Dryfe, Robert A. W.; orcid: 0000-0002-9335-4451
Geim, Andre K.; orcid: 0000-0003-2861-8331
Radha, Boya; orcid: 0000-0003-1345-7029; email: radha.boya@manchester.ac.uk
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2021-05-25
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2020-11-13
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Abstract
Abstract: Membrane-based applications such as osmotic power generation, desalination and molecular separation would benefit from decreasing water friction in nanoscale channels. However, mechanisms that allow fast water flows are not fully understood yet. Here we report angstrom-scale capillaries made from atomically flat crystals and study the effect of confining walls’ material on water friction. A massive difference is observed between channels made from isostructural graphite and hexagonal boron nitride, which is attributed to different electrostatic and chemical interactions at the solid-liquid interface. Using precision microgravimetry and ion streaming measurements, we evaluate the slip length, a measure of water friction, and investigate its possible links with electrical conductivity, wettability, surface charge and polarity of the confining walls. We also show that water friction can be controlled using hybrid capillaries with different slip lengths at opposing walls. The reported advances extend nanofluidics’ toolkit for designing smart membranes and mimicking manifold machinery of biological channels.
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Nature Communications, volume 12, issue 1, page 3092
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Nature Publishing Group UK
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From Springer Nature via Jisc Publications Router
History: received 2020-11-13, accepted 2021-04-20, registration 2021-04-26, pub-electronic 2021-05-25, online 2021-05-25, collection 2021-12
Publication status: Published
Funder: RCUK | Engineering and Physical Sciences Research Council (EPSRC); doi: https://doi.org/10.13039/501100000266; Grant(s): EP/S017593/1
Funder: Royal Society; doi: https://doi.org/10.13039/501100000288; Grant(s): URF\R1\180127, RGS\R2\202036
Funder: EC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 European Research Council (H2020 Excellent Science - European Research Council); doi: https://doi.org/10.13039/100010663; Grant(s): 852674 - AngstroCAP
Funder: Ramsay Memorial Fellowship
History: received 2020-11-13, accepted 2021-04-20, registration 2021-04-26, pub-electronic 2021-05-25, online 2021-05-25, collection 2021-12
Publication status: Published
Funder: RCUK | Engineering and Physical Sciences Research Council (EPSRC); doi: https://doi.org/10.13039/501100000266; Grant(s): EP/S017593/1
Funder: Royal Society; doi: https://doi.org/10.13039/501100000288; Grant(s): URF\R1\180127, RGS\R2\202036
Funder: EC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 European Research Council (H2020 Excellent Science - European Research Council); doi: https://doi.org/10.13039/100010663; Grant(s): 852674 - AngstroCAP
Funder: Ramsay Memorial Fellowship