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autonomous convergence and divergence of the self-powered soft liquid metal vehicles

Science Bulletin 2015年第17期60卷 943-951,I0007页

作者：张洁姚又友刘静 Department of Biomedical Engineering School of MedicineTsinghua University Key Laboratory of Cryogenics Technical Institute of Physics and Chemistry Chinese Academy of Sciences

Conventional rigid machines, even biological systems in nature, generally do not own the capabilities like autonomous convergence or divergence. Here, such extraordinary behavior was demonstrated for the first time with the liquid metal vehicle. This synthetic soft machine fueled with an aluminum flake could initiate its autonomous locomotion in an opentop circular channel containing NaOH solution, like a running vehicle. If cutting a large machine into several smaller separately running vehicles, each of them still resumes its traveling state along the original track and chases each other. If the volumes of such dispersive vehicles were close to each other and they were all squeezed in the channel, the vehicles would move syn-chronously with oscillation. Otherwise, such self-motion would become desynchronized with interval between the inequable vehicles decreased gradually. If their volumes were significantly different, and the smaller vehicles were not squeezed in the channel, the faster vehicle would overtake the slower ones, until they finally coalesced seamlessly. The assembled vehicle could deform itself along with change of its velocity. This finding may shedlight on future researches on smart material, fluid mechanics and soft matter to self-fueled machine and biomimics. It would also offer opportunities for constructing self-reconfigurable soft robots.

关键词： Liquid metal Self-fueled machine soft robot autonomous convergence and divergence soft matter

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