Temperature dependence of the transport of single-file water molecules through a hydrophobic channel

Journal of Computational Chemistry
Jiaye Su, Keda Yang

Abstract

Although great effort has been made on the transport properties of water molecules through nanometer channels, our understanding on the effect of some basic parameters are still rather poor. In this article, we use molecular dynamics simulations to study the temperature effect on the transport of single-file water molecules through a hydrophobic channel. Of particular interest is that the water flow and average translocation time both exhibit exponential relations with the temperature. Based on the continuous-time random-walk model and Arrhenius equation, we explore some new physical insights on these exponential behaviors. With the increase of temperature, the water dipoles flip more frequently, since the estimated flipping barrier is less than 2 kB T. Specifically, the flipping frequency also shows an exponential relation with the temperature. Furthermore, the water-water interaction and water occupancy demonstrate linear relations with the temperature, and the water density profiles along the channel axis can be slightly affected by the temperature. These results not only enhance our knowledge about the temperature effect on the single-file water transport, but also have potential implications for the design of controllable ...Continue Reading

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Citations

Aug 16, 2017·Physical Chemistry Chemical Physics : PCCP·Jiaye SuYue Shi
May 21, 2019·Physical Chemistry Chemical Physics : PCCP·Zhenglong SuJiaye Su
Sep 21, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Yunzhen ZhaoJiaye Su

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