Bioinspired multi-asymmetric magnetized surfaces for tailoring energy-free liquid manipulation and 3-DOF solid transportation
arXiv (Cornell University)(2023)
摘要
Through the utilization of smart materials and well-designed structures,
functional surfaces have been developed to enable small-scale liquid/solid
manipulation tasks, thereby facilitating crucial applications in the fields of
microfluidics, soft robotics, and biomedical engineering. However, the design
of functional systems with flexible, tunable, and multimodal liquid/solid
manipulation capabilities remains a challenging endeavor. Here, inspired by
asymmetric structural features in natural plants and metachrony in cross-scale
biological systems, I report a magnetic-responsive functional surface that can
achieve rich liquid operations under static magnetic fields, while also
enabling the transportation of solids with multiple degrees of freedom (DOFs)
under dynamic magnetic fields. The presence of curvature pillars on the
surface, combined with their magnetic-driven tilt/gradient arrangement, imparts
liquids with multi-directional spreading modes based on the asymmetry of
Laplace pressure. I elucidate the mechanisms governing these liquid spreading
modes and subsequently develop compelling liquid operations, such as adjustable
anti-gravity climbing, spontaneous modal shifts in liquid transport, and liquid
mixing. Furthermore, the dynamic metachronal motion of the magnetic pillars can
be harnessed for solid object transportation. I illustrate the
synchronous/asynchronous transport modes of the surface and propose a novel
strategy for achieving 3-DOF solid transportation by coordinating the
arrangement of objects and employing magnetic actuation strategies. This study
presents a new design concept for application-oriented manipulation surfaces,
which hold significant potential for extensive engineering applications.
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关键词
liquid,surfaces,multi-asymmetric,energy-free
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