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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 44: Micro- and Nanofluidics I

CPP 44.2: Talk

Thursday, March 17, 2011, 14:15–14:30, ZEU 160

AC driven nanopump — •Klaus F. Rinne, Stephan Gekle, Douwe Jan Bonthuis, and Roland Netz — Physik Department, TU München, Germany

We present a novel mechanism for pumping water through a (20,0) carbon nanotube (CNT) without requiring external pressure gradients. Using molecular dynamics simulations (with the LAMMPS package) we show that pumping can be achieved through a periodic electric field. The electrical energy of the water dipoles is translated into particle motion via translation-orientation-coupling. We determine the pumping efficiency consistent with thermodynamics. Our system is simple enough that it could be experimentally realizable and might serve as a basis for microscale filtration systems.