期刊
IEEE TRANSACTIONS ON ROBOTICS
卷 30, 期 1, 页码 40-48出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TRO.2013.2283929
关键词
Catalytic microjets; micromotors; modeling; physics; propulsion; self-assembled microtubes; system performance
类别
资金
- VW Foundation [86362]
- European Research Council under the European Union/ERC [311529]
We describe the propulsion mechanism of the catalytic microjet engines that are fabricated using rolled-up nanotech. Microjets have recently shown numerous potential applications in nanorobotics but currently there is a lack of an accurate theoretical model that describes the origin of the motion as well as the mechanism of self-propulsion. The geometric asymmetry of a tubular microjet leads to the development of a capillary force, which tends to propel a bubble toward the larger opening of the tube. Because of this motion in an asymmetric tube, there emerges a momentum transfer to the fluid. In order to compensate this momentum transfer, a jet force acting on the tube occurs. This force, which is counterbalanced by the linear drag force, enables tube velocities of the order of 100 mu m/s. This mechanism provides a fundamental explanation for the development of driving forces that are acting on bubbles in tubular microjets.
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