Breakdown of fast water transport in graphene oxides.
Breakdown of fast water transport in graphene oxides.
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DOI：
10.1103/physreve.89.012113
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发表时间：
2013-08
期刊：
影响因子：
--
通讯作者：
Ning Wei;Xinsheng Peng;Zhiping Xu
中科院分区：
文献类型：
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作者：
Ning Wei;Xinsheng Peng;Zhiping Xu
对于石墨烯层或碳纳米管之间的层间通道内的水，确定了快速滑移流。我们在这里报告说，这种显着的流速增强（超过两个订单）打破了存在的化学功能化和松弛的纳米限制在氧化石墨烯。分子动力学模拟结果表明，流体力学适用于这种情况下，即使在长度尺度下降到纳米。然而，修正的滑移边界条件和nanobined流的表观粘度必须包括作出定量预测。并结合液态水的结构特征和氢键网络对上述结果进行了讨论。
Fast slip flow was identified for water inside the interlayer gallery between graphene layers or carbon nanotubes. We report here that this significant flow rate enhancement (over two orders) breaks down with the presence of chemical functionalization and relaxation of nanoconfinement in graphene oxides. Molecular dynamics simulation results show that hydrodynamics applies in this circumstance, even at length scales down to nanometers. However, corrections to the slip boundary condition and apparent viscosity of nanoconfined flow must be included to make quantitative predictions. These results were discussed with the structural characteristics of liquid water and hydrogen-bond networks.