Electrowetting in Carbon Nanotubes
We demonstrate reversible wetting and filling of open single-wall carbon nanotubes with mercury by means of electrocapillary pressure originating from the application of a potential across an individual nanotube in contact with a mercury drop. Wetting improves the conductance in both metallic and semiconducting nanotube probes by decreasing contact resistance and forming a mercury nanowire inside the nanotube. Molecular dynamics simulations corroborate the electrocapillarity-driven filling process and provide estimates for the imbibition speed and electrocapillary pressure.
Additional Information© 2005 American Association for the Advancement of Science. 20 September 2005; Accepted 1 November 2005. We thank C. Garland for TEM assistance. Supported in part by NSF (grants CTS-0404353 and CTS-0508096) and in part by the Arrowhead Research Corporation.
Supplemental Material - ChenJ.SOM.pdf