Layering Behavior and Axial Phase Equilibria of Pure Water and Water + Carbon Dioxide Inside Single Wall Carbon Nanotubes

Abstract

We have studied the phase equilibrium and layering behavior of the liquid phase in water and water + CO2 systems inside single wall carbon nanotubes. The system containing pure water was examined at temperatures between 274 and 500 K. At low temperatures and close to the wall of the nanotube, the formation of layers enclosing the liquid phase was observed. Upon addition of CO2, gas−liquid equilibrium was observed, resulting in an enhanced layering effect in the liquid phase.