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Chemmi H, Petit D, Levitz P, et al. Noninvasive Experimental Evidence of the Linear Pore Size Dependence of Water Diffusion in Nanoconfinement. J Phys Chem Lett. 2016;7(3):393-8doi: 10.1021/acs.jpclett.5b02718.
Chemmi, H., Petit, D., Levitz, P., Denoyel, R., Galarneau, A., & Korb, J. P. (2016). Noninvasive Experimental Evidence of the Linear Pore Size Dependence of Water Diffusion in Nanoconfinement. The journal of physical chemistry letters, 7(3), 393-8. https://doi.org/10.1021/acs.jpclett.5b02718
Chemmi, Houria, et al. "Noninvasive Experimental Evidence of the Linear Pore Size Dependence of Water Diffusion in Nanoconfinement." The journal of physical chemistry letters vol. 7,3 (2016): 393-8. doi: https://doi.org/10.1021/acs.jpclett.5b02718
Chemmi H, Petit D, Levitz P, Denoyel R, Galarneau A, Korb JP. Noninvasive Experimental Evidence of the Linear Pore Size Dependence of Water Diffusion in Nanoconfinement. J Phys Chem Lett. 2016 Feb 04;7(3):393-8. doi: 10.1021/acs.jpclett.5b02718. Epub 2016 Jan 15. PMID: 26751162.
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J Phys Chem Lett. 2016 Feb 04;7(3):393-8. doi: 10.1021/acs.jpclett.5b02718. Epub 2016 Jan 15.

Noninvasive Experimental Evidence of the Linear Pore Size Dependence of Water Diffusion in Nanoconfinement.

The journal of physical chemistry letters

Houria Chemmi, Dominique Petit, Pierre Levitz, Renaud Denoyel, Anne Galarneau, Jean-Pierre Korb

Affiliations

  1. Physique de la Matière Condensée, Ecole Polytechnique-CNRS , Palaiseau 91128, France.
  2. Physicochimie des Electrolytes et Nanosystèmes Interfaciaux, CNRS-UMR 8234, Université Pierre et Marie Curie , 4 place Jussieu, 72522 Paris Cedex 5, France.
  3. MADIREL, Aix-Marseille Université, CNRS-UMR 7246 , Centre de St Jérôme, 13397 Marseille Cedex 20, France.
  4. Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-UM-ENSCM, ENSCM , 8 rue de l'Ecole Normale, 34296, Montpellier Cedex 05, France.

PMID: 26751162 DOI: 10.1021/acs.jpclett.5b02718

Abstract

We show that nuclear magnetic relaxation experiments at variable magnetic fields (NMRD) provide noninvasive means for probing the spatial dependence of liquid diffusion close to solid interfaces. These experiments performed on samples of cylindrical and spherical nanopore geometries demonstrate that the average diffusion coefficient parallel to the interface is proportional to the pore radii in different dynamics regimes. A master curve method allows extraction of gradients of diffusion coefficients in proximity of the pore surfaces, indicative of the efficiency of coupling between liquid layers. Due to their selectivity in frequency, NMRD experiments are able to differentiate the different water dynamical events induced by heterogeneous surfaces or composed dynamical processes. This analysis relevant in physical and biological confinements highlights the interplay between the molecular and continuous description of fluid dynamics near interfaces.

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