Influence of carbon nanocone structure on ultra-efficient water flow

TL;DR

This study uses molecular dynamics simulations to explore how the structure of carbon nanocones influences water flow, revealing optimal geometries for enhanced flow and potential applications in water purification.

Contribution

It demonstrates how nanocone geometry affects water transport, identifying configurations that maximize flow and separation efficiency for technological applications.

Findings

Larger openings increase water flow significantly.

Narrower cones limit water mobility due to confinement.

Nanocones act as effective nanofilters for water purification.

Abstract

In this study, using nonequilibrium molecular dynamics simulation, the water flow in carbon nanocones is studied using the TIP4P/2005 rigid water model. The results demonstrate a nonuniform dependence of the flow on the cone apex angle and the diameter of the opening where the flow is established, leading to a significant increase in the flow in some cases. The effects of cone diameter and pressure gradient are investigated to explain flow behavior with different system structures. We observed that some cones can optimize the water flow precisely. Nanocones with a larger opening facilitate the sliding of water, significantly increasing the flow, thus being promising membranes for technological use in water impurity separation processes. Nanocones with narrower opening angles limited water mobility due to excessive confinement. This phenomenon is linked to the ability of water to form a larger hydrogen-bond network in typical systems with diameters of this size, obtaining a single-layer water structure. Nanocones act as selective nanofilters capable of allowing water molecules to pass through while blocking salts and impurities. The conical shape of their structures creates a directed flow that improves separation efficiency. Membranes based on carbon nanocones are becoming promising for clean, smart, and efficient technologies. The combination of transport speed, selectivity, and structural control put them ahead of other nanostructures for various purposes.