Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/64703
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Type: | Journal article |
Title: | Ion-specific anomalous electrokinetic effects in hydrophobic nanochannels |
Author: | Huang, D. Cottin-Bizonne, C. Ybert, C. Bocquet, L. |
Citation: | Physical Review Letters, 2007; 98(17):1-4 |
Publisher: | American Physical Soc |
Issue Date: | 2007 |
ISSN: | 0031-9007 1079-7114 |
Statement of Responsibility: | David M. Huang, Cécile Cottin-Bizonne, Christophe Ybert, and Lydéric Bocquet |
Abstract: | We show with computer simulations that anomalous electrokinetic effects, such as ion specificity and nonzero zeta potentials for uncharged surfaces, are generic features of electro-osmotic flow in hydrophobic channels. This behavior is due to the stronger attraction of larger ions to the “vapor-liquidlike” interface induced by a hydrophobic surface. We propose an analytical model involving a modified Poisson-Boltzmann description for the ion density distributions that quantitatively predicts the anomalous flow profiles. This description includes as a crucial component an ion-size-dependent hydrophobic solvation energy. These results provide an effective framework for predicting ion-specific effects, with potentially important implications for biological modeling. |
Keywords: | Sodium Chloride Ions Sodium Iodide Electric Conductivity Models, Biological Nanostructures Computer Simulation Hydrophobic and Hydrophilic Interactions |
Rights: | ©2007 American Physical Society |
DOI: | 10.1103/PhysRevLett.98.177801 |
Published version: | http://dx.doi.org/10.1103/physrevlett.98.177801 |
Appears in Collections: | Aurora harvest 5 Chemistry publications |
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hdl_64703.pdf | Published version | 344.21 kB | Adobe PDF | View/Open |
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