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Equilibrium molecular dynamics has been used to investigate ion and water distributions of 0.5 M sodium chloride solutions of approximate density, 1000 kg m m 3 , confined in model carbon nanotubes having radii of 0.65, 1.33 and 1.97 nm. It is observed that ion pairing can occur; its nature and location being highly dependent on pore radius. Especially notable in the smallest cylinder, where hydration is frustrated by confinement, is the formation of tightly bound ion pairs at the cylinder axis.
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Nicholson et al. (2003) studied this question.
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