Dynamics of confined water in porous alumina: neutron-scattering study
Dynamics of confined water in porous alumina: neutron-scattering study
复制标题
DOI：
10.1007/s003390201697
复制
发表时间：
2002-12
期刊：
影响因子：
--
通讯作者：
R. Mukhopadhyay;S. Mitra;K. T. Pillai;I. Tsukushi;S. Ikeda
中科院分区：
文献类型：
--
作者：
R. Mukhopadhyay;S. Mitra;K. T. Pillai;I. Tsukushi;S. Ikeda
我们报告了在室温及以下温度下通过高分辨率准弹性中子散射技术研究的氧化铝凝胶孔中所含水分子的动力学。发现一些水分子附着在氧化铝凝胶的内表面（局部），而其他水分子则在孔中的可用空间内扩散。获得水分子进行局部运动的局域半径和扩散常数（Dloc）。还获得了水分子在氧化铝凝胶孔内扩散的扩散常数（Dt）和停留时间（τconf）。研究发现，水分子在孔隙中的扩散常数和停留时间与本体水有很大不同。
We report dynamics of water molecules contained in the pores of alumina gel as studied by the high-resolution quasi-elastic neutron scattering technique at room temperature and below. Some water molecules are found to be attached on the inner surfaces of the alumina gel (localized) and others undergo diffusion within the available space in the pores. The localization radius and the diffusion constant (Dloc) of water molecules performing local motion are obtained. The diffusion constant (Dt) and the residence time (τconf) of the water molecules diffusing inside the alumina-gel pores are also obtained. It is found that the diffusion constant and the residence time of water molecules in the pores are very much different to those of bulk water.