Electric fields can control the transport of water in carbon nanotubes.

Philos Trans A Math Phys Eng Sci

School of Engineering, University of Edinburgh, Edinburgh EH9 3FB, UK.

Published: February 2016

The properties of water confined inside nanotubes are of considerable scientific and technological interest. We use molecular dynamics to investigate the structure and average orientation of water flowing within a carbon nanotube. We find that water exhibits biaxial paranematic liquid crystal ordering both within the nanotube and close to its ends. This preferred molecular ordering is enhanced when an axial electric field is applied, affecting the water flow rate through the nanotube. A spatially patterned electric field can minimize nanotube entrance effects and significantly increase the flow rate.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4696074PMC
http://dx.doi.org/10.1098/rsta.2015.0025DOI Listing

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