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Influence of exchange in NMR pore size/relaxation correlation experiments
(Elsevier Science, 2018-10)
The influence of molecular exchange in porous polymeric systems on experiments that simultaneously correlate and determine pore length scales and surface relaxivities is studied. Pore length scales are determined by taking ...
Molecular Dynamics Simulations of Water Confined in Calcite Slit Pores: An NMR Spin Relaxation and Hydrogen Bond Analysis
(American Chemical Society, 2017-03)
We study water confined in calcite (104) slit pores from 6 to 1 nm by molecular dynamics. By determining NMR parameters combined with hydrogen bond network analysis, we provide an important contribution to the understanding ...
On the Validity of the Relationship 1/T = 1/T B+1/T S+1/T D in NMR Techniques With Regards to Permeability Estimation of Natural Porous Media
(Frontiers Media, 2021)
One of the most relevant feature of geophysical techniques based on nuclear magnetic resonance is their ability to estimate the permeability of natural porous media, since other geophysical techniques, as the use of the ...
Enhanced surface interaction of water confined in hierarchical porous polymers induced by hydrogen bonding
(American Chemical Society, 2016-06)
Hierarchical porous polymer systems are increasingly applied to catalysis, bioengineering, or separation technology because of the versatility provided by the connection of mesopores with percolating macroporous structures. ...
Limits imposed by liquid/surface interactions in the determination of tortuosity in mesopores
(Elsevier Science, 2020-10-01)
The restricted mobility of different liquids, polar and non-polar, were studied by means of 1H NMR diffusion and Larmor frequency dependent relaxation measurements, upon confinement in mesoporous silica with mean pore sizes ...
Excess Sorption of Supercritical CO2 within Cylindrical Silica Nanopores
(American Chemical Society, 2016-01)
Using Molecular Dynamics simulations, we examine structural and dynamical properties of supercritical CO2 confined within cylindrical hydrophobic nanopores of diameters 38 and 10 Å. Computer simulations were performed along ...
Spatially Resolved Monitoring of Drying of Hierarchical Porous Organic Networks
(American Chemical Society, 2016-02)
Evaporation kinetics of water confined in hierarchal polymeric porous media is studied by low field nuclear magnetic resonance (NMR). Systems synthesized with various degrees of cross-linker density render networks with ...
Fresh Molecular Look at Calcite-Brine Nanoconfined Interfaces
(American Chemical Society, 2018-03)
Calcite-fluid interface plays a central role in geochemical, synthetic, and biological crystal growth. The ionic nature of the calcite surface can modify the fluid-solid interaction and the fluid properties under spatial ...