title: Fast water channeling across carbon nanotubes in far infrared terahertz electric fields.
abstract: Using molecular dynamics simulations, we investigate systematically the water permeation properties across single-walled carbon nanotubes (SWCNT) in the presence of the terahertz electric field (TEF). With the TEF normal to the nanotube, the fracture of the hydrogen bonds results in the giant peak of net fluxes across the SWCNT with a three-fold enhancement centered around 14 THz. The phenomenon is attributed to the resonant mechanisms, characterized by librational, rotational, and rotation-induced responses of in-tube polar water molecules to the TEF. For the TEF along the symmetry axis of the nanotube, the vortical modes for resonances and consequently the enhancement of net fluxes are greatly suppressed by the alignment of polar water along the symmetry axis, which characterizes the quasi one-dimensional feature of the SWCNT nicely. The resonances of water molecules in the TEF can have potential applications in the high-flux device designs used for various purposes.
authors.affiliation: Department of Physics, Southeast University, Nanjing 211189, China. wzjiang@seu.edu.cn and Department of Mathematics and Physics, Anhui Polytechnic University, Anhui 241000, China.
authors.forename: Qi-Lin
authors.initials: QL
authors.lastname: Zhang
authors.affiliation: Department of Physics, Southeast University, Nanjing 211189, China. wzjiang@seu.edu.cn.
authors.forename: Rong-Yao
authors.initials: RY
authors.lastname: Yang
authors.affiliation: Department of Physics, Southeast University, Nanjing 211189, China. wzjiang@seu.edu.cn.
authors.forename: Wei-Zhou
authors.initials: WZ
authors.lastname: Jiang
authors.affiliation: Department of Physics, Southeast University, Nanjing 211189, China. wzjiang@seu.edu.cn.
authors.forename: Zi-Qian
authors.initials: ZQ
authors.lastname: Huang