CAS OpenIR  > 中科院上海应用物理研究所2004-2010年
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
2007
Source PublicationPROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN0027-8424
Volume104Issue:10Pages:3687
AbstractWater 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.
KeywordCarbon Nanotube Molecular Switch Nanogate
Subject AreaNuclear Science & Technology ; Physics
Indexed Bysci
Language英语
Funding Project应物所项目组
WOS IDWOS:000244972400006
Citation statistics
Cited Times:263[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/8051
Collection中科院上海应用物理研究所2004-2010年
Corresponding AuthorFang, 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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