Berlin 2012 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 21: Poster: Wetting, Micro and nanofluidics

CPP 21.12: Poster

Wednesday, March 28, 2012, 11:00–13:00, Poster A

Nanoscale pumping of water by AC electric fields — •Klaus Rinne¹, Stephan Gekle², Douwe Jan Bonthuis², and Roland Netz¹ — ¹Fachbereich Physik, Freie Universität Berlin, 14195 Berlin, Germany — ²Technische Universität München, 85748 Garching, Germany

Using molecular dynamics simulations we present a novel mechanism for pumping of water through a carbon nanotube by time-dependent electric fields. The fields are generated by electrodes with oscillating charges in a broad GHz frequency range which are attached laterally to the tube. The key ingredient is a phase shift between the electrodes to break the spatio-temporal symmetry. A microscopic theory based on a polarization-dragging mechanism accounts quantitatively for our numerical findings.