Electromanipulating Water Flow in Nanochannels
Electromanipulating Water Flow in Nanochannels
复制标题
纳米通道中的电操纵水流
DOI：
10.1002/anie.201408633
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发表时间：
2015
影响因子：
16.6
通讯作者：
Fan Jintu
中科院分区：
文献类型：
--
作者：
Kou Jianlong;Yao Jun;Lu Hangjun;Zhang Bo;Li Aifen;Sun Zhixue;Zhang Jianguang;Fang Yunzhang;Wu Fengmin;Fan Jintu
分子动力学模拟表明，纳米通道外的振动电荷可以促进水的通量，这与纳米通道外的固定电荷阻碍水通过纳米通道的普遍观点形成鲜明对比。在振动电荷系统中，电荷与纳米通道之间距离的减小导致水净通量的增加，这与固定电荷系统相反。当净水通量受到电荷振动频率的强烈影响时，净水通量的增加是由振动电荷引起的氢键断裂的结果。特别是，当振动频率与纳米通道内氢键固有频率匹配时，净通量达到最大值。这种电操纵输运现象为纳米通道内的水输运提供了一种重要的新机制。
In sharp contrast to the prevailing view that a stationary charge outside a nanochannel impedes water permeation across the nanochannel, molecular dynamics simulations show that a vibrational charge outside the nanochannel can promote water flux. In the vibrational charge system, a decrease in the distance between the charge and the nanochannel leads to an increase in the water net flux, which is contrary to that of the fixed‐charge system. The increase in net water flux is the result of the vibrational charge‐induced disruption of hydrogen bonds when the net water flux is strongly affected by the vibrational frequency of the charge. In particular, the net flux is reaches a maximum when the vibrational frequency matches the inherent frequency of hydrogen bond inside the nanochannel. This electromanipulating transport phenomenon provides an important new mechanism of water transport confined in nanochannels.