ENHANCED SELF-DIFFUSION OF WATER IN RESTRICTED GEOMETRY
ENHANCED SELF-DIFFUSION OF WATER IN RESTRICTED GEOMETRY
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DOI：
10.1103/physrevlett.63.43
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发表时间：
1989-07-03
影响因子：
8.6
通讯作者：
GERHARDT, R
中科院分区：
文献类型：
--
作者：
DORAZIO, F;BHATTACHARJA, S;GERHARDT, R
多孔玻璃中所含的水的自扩散被观察到强烈增强，如果孔隙空间仅被部分填充。这可以用一种新的机制来解释，该机制涉及液相和气相之间的间接分子交换。一个理论模型适合脉冲场梯度NMR扩散测量，没有可调参数。进行NMR弛豫测量以提供样品均匀性的表征。
Self-diffusion of water contained in a porous glass is observed to be strongly enhanced if the pore space is only partially filled. This can be explained by a novel mechanism involving indirect molecular exchange between the liquid and the vapor phase. A theoretical model fits the pulsed-field-gradient NMR diffusion measurements with no adjustable parameters. NMR relaxation measurements were performed to provide a characterization of the homogeneity of the samples.