Programmable curvilinear self-propelling of dropletswithout preset channels

Shile Feng; Yongping Hou; Yongmei Zheng

doi:10.1002/dro2.138

Droplet ›› 2024, Vol. 3 ›› Issue (4) : e138 DOI: 10.1002/dro2.138

RESEARCH ARTICLE

Programmable curvilinear self-propelling of dropletswithout preset channels

Shile Feng ¹^,²^,^†
, Yongping Hou ¹^,^†
, Yongmei Zheng ¹^,^†

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Abstract

Curvilinear self-propelling of droplets has attracted great interest in the past few decades due to their irreplaceable roles in many areas. Conventional understanding is that a droplet moves only along a preset channel formed by morphology or chemical components. Achieving programmable curvilinear droplet motion independent of a preset channel remains greatly challenging. Here, we report a programmable curvilinear self-propelling of droplets (circle, divergence, and convergence) based on the collaboration of the curvilinearwetting gradient and the Leidenfrost effect. This design achieves motion trajectory in awell-controlled manner aswell as high velocity and long distance of droplet transport independent of the preset channel. Moreover, the motion behaviors of droplets could be predicted accurately by theoretic simulation.We envision that our unique design could manifest extensive practical applications in fluidic devices, liquid transport, and heat transfer systems.

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Shile Feng, Yongping Hou, Yongmei Zheng. Programmable curvilinear self-propelling of dropletswithout preset channels. Droplet, 2024, 3(4): e138 DOI:10.1002/dro2.138

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