Ionic current through a nanopore three nanometers in diameter.
Ionic current through a 3 nm in diameter nanopore has been investigated using molecular dynamics. Results indicate that the ionic current increases linearly as the electrolyte concentration increases from 0.4 to 0.9 M, beyond which the ionic current increases at a slower rate. In contradiction to the expectation that higher surface charge density will lead to more ions in the nanopore, and therefore, higher ionic current, the ionic current shows an increase-decrease profile as the surface charge density increases. These unusual observations are attributed to the fact that ions close to the wall experience large viscous force, leading to low mobility.
Ge
Yanyan
Y
Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments and China Education Council Key Laboratory of MEMS, School of Mechanical Engineering, Southeast University, Nanjing 210096, People's Republic of China.
Xu
Dongyan
D
Yang
Juekuan
J
Chen
Yunfei
Y
Li
Deyu
D
D004553:Electric Conductivity; D007477:Ions / Q000737:chemistry*; D007700:Kinetics; D016014:Linear Models; D008956:Models, Chemical; D036103:Nanotechnology; D016062:Porosity; D012964:Sodium / Q000737:chemistry; D012965:Sodium Chloride / Q000737:chemistry; D013499:Surface Properties
D007477:Ions; D012965:Sodium Chloride; D012964:Sodium