Fast transport of water in carbon nanotubes: a review of current accomplishments and challenges

The intriguing mass transport properties of carbon nanotubes (CNTs) have received widespread attention, especially the rapid transport of water through CNTs due to their atomically smooth wall interiors. Extensive research has been dedicated to the comprehension of various aspects of water flow in contact with CNTs, the most prominent ones being the studies on slip and flow rates. Experimental and computational studies have confirmed an enhanced water flow rate through this graphitic nanoconfinement. However, a quantitative agreement has not yet been attained. These disparities coupled with incomplete knowledge of the mechanisms of water transport at nanoscale regimes are hindering the possibilities to integrate CNTs in numerous nanofluidic applications. In the present review, we focus on the slip and flow rates of water through CNTs and the factors influencing them. We discuss the key sources of discrepancies in water flow rate and suggest directions for future study.

Automated summary

The mass transport properties of carbon nanotubes, particularly the rapid transport of water through them, have attracted significant attention. Research has focused on understanding the mechanisms of water flow in contact with CNTs, particularly slip and flow rates, with confirmed enhancements in water flow rate through graphitic nanoconfinement. However, discrepancies in quantitative agreement and incomplete knowledge of water transport mechanisms at nanoscale regimes are hindering the integration of CNTs in various nanofluidic applications. Further studies are needed to address the sources of disparities in water flow rate and suggest future research directions.