Equilibrium and Kinetics: Water Confined in Carbon Nanotube as 1D Lattice Gas

TL;DR

This paper introduces a 1D lattice gas model that accurately captures the equilibrium and kinetic behaviors of water confined in carbon nanotubes, providing clear insights into the physical interactions involved.

Contribution

The model offers a new, simplified framework for understanding water dynamics in nanotubes, aligning well with molecular dynamics simulations.

Findings

The model accurately describes water filling and emptying processes.

Physical interactions are clearly linked to kinetic behaviors.

Single-file water transport is explained through simple physical principles.

Abstract

A simple 1D lattice gas model is presented, which very well describes the equilibrium and kinetic behaviors of water confined in a thin carbon nanotube found in an atomistic molecular dynamics(MD) simulation {[} Nature {\bf 414}, 188 (2001) {]}. The model parameters are corresponding to various physical interactions and can be calculated or estimated in statistic mechanics. The roles of every interaction in the water filling, emptying and transporting processes are clearly understood. Our results indicate that the physical picture of the single-file kinetics is very simple.