Xe-129 NMR as a probe of the dynamics of gas confined in porous vycor

被引：4

作者：

Pasquier, V ^{[1
]}

Levitz, P ^{[1
]}

Tinet, D ^{[1
]}

Delville, A ^{[1
]}

机构：

[1] CRMD,CNRS,F-45071 ORLEANS 02,FRANCE

来源：

MAGNETIC RESONANCE IMAGING | 1996年 / 14卷 / 7-8期

关键词：

D O I：

10.1016/S0730-725X(96)00198-1

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

We use Xe-129 NMR to probe the diffusion of xenon gas in the porous network of Vycor glass, by monitoring its relaxation properties, When the mean free path of the diffusing gas is larger than the pore size (Knudsen conditions), both Xe-129 chemical shifts and relaxation rates are sensitive to the confinement of xenon gas within a porous solid, The influence of both temperature and xenon pressure are recorded on the Xe-129 chemical shifts and relaxation rates, in order to characterise the xenon/Vycor interactions, Monte Carlo (MC) and Molecular Dynamics (MD) simulations, using a numerical model of Vycor, are required to interpret the relaxation properties of xenon, MD simulations clearly establish the occurrence of confined diffusion of xenon within Vycor, related to the geometry of this porous media, This work shows the potentiality of NMR relaxation to obtain dynamical information on the diffusion within porous media. Copyright (C) 1996 Elsevier Science Inc.

引用

页码：971 / 973

页数：3

共 14 条

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