类似蜈蚣的 metastrip 实现按需可编程液滴运动
Centipede-Like Metastrip Enables On-Demand Programmable Droplet Motion
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中文总结 AI 辅助
该研究设计了带蜈蚣状悬臂谐振器阵列的弹性 metastrip，通过谐波激励建立 IP-OOP 相位分布，结合可重构 OOP 带隙与多频率激励，实现了可编程、尺寸及位置选择性的液滴运动控制。
中文摘要 AI 辅助
我们在带有类似蜈蚣的悬臂谐振器阵列的弹性 metastrip 基底上，展示了可编程、频率可调且尺寸选择性的液滴运动。在谐波激励下，该条带同时经历面内（IP）集体运动和面外（OOP）变形，从而建立起依赖频率的 IP-OOP 相位分布。这根据液滴在条带上的位置规定了其运动方向，导致聚集区和稀疏区的出现。通过调整谐振器的尖端质量，我们打开可重构的 OOP 带隙，该带隙会改变 IP-OOP 相位构成并局部抑制液滴运动，从而增加了空间选择性的额外层面。利用多频率激励，我们可根据液滴的共振选择性驱动它们，有效按体积和位置对液滴进行筛选。
英文摘要
We demonstrate programmable, frequency-tunable and size-selective drop motion on an elastic metastrip substrate with a centipede-like array of cantilever resonators. Under harmonic excitation, the strip experiences simultaneously an in-plane (IP) collective motion and out-of-plane (OOP) deformation, thus establishing a frequency-dependent IP-OOP phase landscape. This prescribes the direction of motion to the drops on the strip based on their position, causing the emergence of clustering and rarefaction regions. By tuning the tip masses of the resonators, we open reconfigurable OOP bandgaps that modify the IP-OOP phase makeup and locally suppress drop motion, contributing an additional layer of spatial selectivity. Using multi-frequency excitations, we selectively actuate drops based on their resonances, effectively filtering them by volume and position.
