Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/6738
Title: Electric field controlled transport of water in graphene nano-channels
Authors: Çelebi, Alper Tunga
Barışık, Murat
Beşkök, Ali
Keywords: Graphene
Deionized water
Electric fields
Molecular dynamics
Nanosystems
Issue Date: Oct-2017
Publisher: American Institute of Physics
Source: Çelebi, A. T., Barışık, M., and Beşkök, A. (2017). Electric field controlled transport of water in graphene nano-channels. Journal of Chemical Physics, 147(16). doi:10.1063/1.4996210
Abstract: Motivated by electrowetting-based flow control in nano-systems, water transport in graphene nano-channels is investigated as a function of the applied electric field. Molecular dynamics simulations are performed for deionized water confined in graphene nano-channels subjected to opposing surface charges, creating an electric field across the channel. Water molecules respond to the electric field by reorientation of their dipoles. Oxygen and hydrogen atoms in water face the anode and cathode, respectively, and hydrogen atoms get closer to the cathode compared to the oxygen atoms near the anode. These effects create asymmetric density distributions that increase with the applied electric field. Force-driven water flows under electric fields exhibit asymmetric velocity profiles and unequal slip lengths. Apparent viscosity of water increases and the slip length decreases with increased electric field, reducing the flow rate. Increasing the electric field above a threshold value freezes water at room temperature.
URI: http://doi.org/10.1063/1.4996210
http://hdl.handle.net/11147/6738
ISSN: 0021-9606
1089-7690
Appears in Collections:Mechanical Engineering / Makina Mühendisliği
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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