| Effect of the Carbon-Nanotube Length on Water Permeability |
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| 引用本文： | 李敬源 杨再兴 方海平 周如洪 唐孝威. Effect of the Carbon-Nanotube Length on Water Permeability[J]. 中国物理快报, 2007, 24(9): 2710-2713 |
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| 作者姓名： | 李敬源 杨再兴 方海平 周如洪 唐孝威 |
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| 作者单位： | [1]Department of Physics, Zhejiang University, Hangzhou 310027 [2]Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800 [3]IBM Thomas J. Watson Research Center, Yorktown Heights, NY 10598, USA [4]Department of Chemistry, Columbia University, New York, NY 10027, USA |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 10474109 and 10674146. |
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| 摘 要： | Effect of the carbon nanotube （CNT） channel length on the water flow through the CNT is studied using molecular dynamics simulations. The water flow is found to decay with the channel length （-1/N^2.3, N is the number of carbon rings along the nanotube axis）, much faster than that predicted by a previous continuous-time random walk （CTRW） model （-1/N）. This unexpected decay rate of flow is found to result from the weakening of the correlation of the concerted motion of the water molecules inside the ONT. An improved CTRW model is then proposed by taking into account of this effect. Meanwhile, the diffusion constant of water molecules inside CNTs with various lengths is found to be relatively invariant, which results in a relatively constant hopping rate.
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| 关 键 词： | 碳元素 水 导磁性 长度 |
| 收稿时间： | 2007-04-15 |
| 修稿时间： | 2007-04-15 |
Effect of the Carbon-Nanotube Length on Water Permeability |
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| LI Jing-Yuan,YANG Zai-Xing,FANG Hai-Ping,ZHOU Ru-Hong TANGXiao-Wei. Effect of the Carbon-Nanotube Length on Water Permeability[J]. Chinese Physics Letters, 2007, 24(9): 2710-2713 |
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| Authors: | LI Jing-Yuan YANG Zai-Xing FANG Hai-Ping ZHOU Ru-Hong TANGXiao-Wei |
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| Affiliation: | 1 Department of Physics, Zhejiang University, Hangzhou 310027 ;2.Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800 ;3.IBM Thomas J. Watson Research Center, Yorktown Heights, NY 10598, USA ; 4 Department of Chemistry, Columbia University, New York, NY 10027, USA |
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| Abstract: | |
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| Keywords: | 87.14.Gg 87.15.He 36.20.Ey |
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