Nanofluidic Osmotic Diodes: Theory and Molecular Dynamics Simulations
Osmosis describes the flow of water across semipermeable membranes powered by the chemical free energy extracted from salinity gradients. While osmosis can be expressed in simple terms via the van ’t Hoff ideal gas formula for the osmotic pressure, it is a complex phenomenon taking its roots in the...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/85670 |
| _version_ | 1826198234225180672 |
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| author | Picallo, Clara Gravelle, Simon Joly, Laurent Charlaix, Elisabeth Bocquet, Lyderic |
| author2 | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Picallo, Clara Gravelle, Simon Joly, Laurent Charlaix, Elisabeth Bocquet, Lyderic |
| author_sort | Picallo, Clara |
| collection | MIT |
| description | Osmosis describes the flow of water across semipermeable membranes powered by the chemical free energy extracted from salinity gradients. While osmosis can be expressed in simple terms via the van ’t Hoff ideal gas formula for the osmotic pressure, it is a complex phenomenon taking its roots in the subtle interactions occurring at the scale of the membrane nanopores. Here we use new opportunities offered by nanofluidic systems to create an osmotic diode exhibiting asymmetric water flow under reversal of osmotic driving. We show that a surface charge asymmetry built on a nanochannel surface leads to nonlinear couplings between water flow and the ion dynamics, which are capable of water flow rectification. This phenomenon opens new opportunities for water purification and complex flow control in nanochannels. |
| first_indexed | 2024-09-23T11:01:30Z |
| format | Article |
| id | mit-1721.1/85670 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:01:30Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/856702022-10-01T00:36:12Z Nanofluidic Osmotic Diodes: Theory and Molecular Dynamics Simulations Picallo, Clara Gravelle, Simon Joly, Laurent Charlaix, Elisabeth Bocquet, Lyderic Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Bocquet, Lyderic Osmosis describes the flow of water across semipermeable membranes powered by the chemical free energy extracted from salinity gradients. While osmosis can be expressed in simple terms via the van ’t Hoff ideal gas formula for the osmotic pressure, it is a complex phenomenon taking its roots in the subtle interactions occurring at the scale of the membrane nanopores. Here we use new opportunities offered by nanofluidic systems to create an osmotic diode exhibiting asymmetric water flow under reversal of osmotic driving. We show that a surface charge asymmetry built on a nanochannel surface leads to nonlinear couplings between water flow and the ion dynamics, which are capable of water flow rectification. This phenomenon opens new opportunities for water purification and complex flow control in nanochannels. 2014-03-17T14:08:19Z 2014-03-17T14:08:19Z 2013-12 2013-05 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/85670 Picallo, Clara, Simon Gravelle, Laurent Joly, Elisabeth Charlaix, and Lyderic Bocquet. “Nanofluidic Osmotic Diodes: Theory and Molecular Dynamics Simulations.” Physical Review Letters 111, no. 24 (December 2013). © 2013 American Physical Society en_US http://dx.doi.org/10.1103/PhysRevLett.111.244501 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society American Physical Society |
| spellingShingle | Picallo, Clara Gravelle, Simon Joly, Laurent Charlaix, Elisabeth Bocquet, Lyderic Nanofluidic Osmotic Diodes: Theory and Molecular Dynamics Simulations |
| title | Nanofluidic Osmotic Diodes: Theory and Molecular Dynamics Simulations |
| title_full | Nanofluidic Osmotic Diodes: Theory and Molecular Dynamics Simulations |
| title_fullStr | Nanofluidic Osmotic Diodes: Theory and Molecular Dynamics Simulations |
| title_full_unstemmed | Nanofluidic Osmotic Diodes: Theory and Molecular Dynamics Simulations |
| title_short | Nanofluidic Osmotic Diodes: Theory and Molecular Dynamics Simulations |
| title_sort | nanofluidic osmotic diodes theory and molecular dynamics simulations |
| url | http://hdl.handle.net/1721.1/85670 |
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