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| Electrostatic gating of a nanometer water channel | |
Li, JY ; Gong, XJ; Lu, HJ; Li, D（李迪）; Fang, HP（方海平）; Zhou, RH; Fang, HP (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, POB 800-204, Shanghai 201800, Peoples R China
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| 2007 | |
| Source Publication | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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| ISSN | 0027-8424 |
| Volume | 104Issue:10Pages:3687 |
| Abstract | Water permeation across a single-walled carbon nanotube (SWNT) under the influence of a mobile external charge has been studied with molecular dynamics simulations. This designed nanopore shows an excellent on-off gating behavior by a single external charge (of value +1.0e): it is both sensitive to the available charge signal when it is close (less than a critical distance of 0.85 angstrom or about half the size of a water molecule) and effectively resistant to charge noise, i.e., the effect on the flow and net flux across the channel is found to be negligible when the charge is > 0.85 angstrom away from the wall of the nanopore. This critical distance can be estimated from the interaction balance for the water molecule in the SWNT closest to the imposed charge with its neighboring water molecules and with the charge. The flow and net flux decay exponentially with respect to the difference between these two interaction energies when the charge gets closer to the wall of the SWNT and reaches a very small value once the charge crosses the wall, suggesting a dominating effect on the permeation properties from local water molecules near the external charge. These findings might have biological implications because membrane water channels share a similar single-file water chain inside these nanoscale channels. |
| Keyword | Carbon Nanotube Molecular Switch Nanogate |
| Subject Area | Nuclear Science & Technology ; Physics |
| Indexed By | sci |
| Language | 英语 |
| Funding Project | 应物所项目组 |
| WOS ID | WOS:000244972400006 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.sinap.ac.cn/handle/331007/8051 |
| Collection | 中科院上海应用物理研究所2004-2010年 |
| Corresponding Author | Fang, HP (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, POB 800-204, Shanghai 201800, Peoples R China |
| Recommended Citation GB/T 7714 | Li, JY,Gong, XJ,Lu, HJ,et al. Electrostatic gating of a nanometer water channel[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2007,104(10):3687. |
| APA | Li, JY.,Gong, XJ.,Lu, HJ.,Li, D.,Fang, HP.,...&Fang, HP .(2007).Electrostatic gating of a nanometer water channel.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,104(10),3687. |
| MLA | Li, JY,et al."Electrostatic gating of a nanometer water channel".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 104.10(2007):3687. |
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