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231224s2016 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.6b00791
|2 doi
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|a eng
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|a De Luca, Sergio
|e verfasserin
|4 aut
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|a Effects of Confinement on the Dielectric Response of Water Extends up to Mesoscale Dimensions
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|c 2016
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|a Text
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|a ƒaComputermedien
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|a Date Completed 18.05.2018
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|a Date Revised 18.05.2018
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a The extent of confinement effects on water is not clear in the literature. While some properties are affected only within a few nanometers from the wall surface, others are affected over long length scales, but the range is not clear. In this work, we have examined the dielectric response of confined water under the influence of external electric fields along with the dipolar fluctuations at equilibrium. The confinement induces a strong anisotropic effect which is evident up to 100 nm channel width, and may extend to macroscopic dimensions. The root-mean-square fluctuations of the total orientational dipole moment in the direction perpendicular to the surfaces is 1 order of magnitude smaller than the value attained in the parallel direction and is independent of the channel width. Consequently, the isotropic condition is unlikely to be recovered until the channel width reaches macroscopic dimensions. Consistent with dipole moment fluctuations, the effect of confinement on the dielectric response also persists up to channel widths considerably beyond 100 nm. When an electric field is applied in the perpendicular direction, the orientational relaxation is 3 orders of magnitude faster than the dipolar relaxation in the parallel direction and independent of temperature
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Kannam, Sridhar Kumar
|e verfasserin
|4 aut
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|a Todd, B D
|e verfasserin
|4 aut
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|a Frascoli, Federico
|e verfasserin
|4 aut
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|a Hansen, J S
|e verfasserin
|4 aut
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|a Daivis, Peter J
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 32(2016), 19 vom: 17. Mai, Seite 4765-73
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:32
|g year:2016
|g number:19
|g day:17
|g month:05
|g pages:4765-73
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|u http://dx.doi.org/10.1021/acs.langmuir.6b00791
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