Ultrafast Active Water Pump Driven by Terahertz Electromagnetic Field

Abstract

The highly efficient, easy-to-implement, long-ranged and non-destructive way to realize active pumping has been still a great challenge. Here, using molecular dynamics simulations, terahertz electromagnetic wave (TEW) is firstly employed to stimulate an active pump for water transportation by biasedly irradiated in a (6,6) single-walled carbon nanotube (SWCNT) under no external pressure gradient. It is found that an ultrafast conductivity (up to 9.5 /ns) through the pump around a characteristic frequency of 14 THz. The excellent pumping ability is attributed to the resonance coupling between the TEW and water molecules, in which water molecules can gain considerable energy continuously to break the binding of hydrogen bonds and the spatial symmetry. This proposed TEW-driven pump concept will offer a guide in polar molecule transport through artificial or biological nanochannels, particularly in a controllable, non-contact and large-scale process.

References in corpus (4)

• Carbon nanotubes as multifunctional biological transporters and near-infrared agents for selective cancer cell destruction
• Water Transport through Carbon Nanotubes with the Radial Breathing Mode
• Fast Water Channeling across Carbon Nanotubes in Far Infrared Terahertz Electric Fields
• The resonant heating of heavy water solutions under the terahertz pulse irradiation