摘要 : Directional liquid spreading has an irreplaceable role in applications such asmicrofluidic devices, disposable biosensors, and point-of-care diagnostics.However, how to achieve directional, rapid, and complete spreading (i.e.,supe... 展开 Directional liquid spreading has an irreplaceable role in applications such asmicrofluidic devices, disposable biosensors, and point-of-care diagnostics.However, how to achieve directional, rapid, and complete spreading (i.e.,superspreading) of liquids without external energy input is a great challenge.Herein, inspired by the peristome surface of Nepenthes pitcher, the directionalsuperspreading of water droplets on hydrogel surfaces with predesignedmicrochannels by using the synergistic effect of the liquid-like property ofhydrogels and the guidance of anisotropic microstructures is reported.Compared with the smooth ones, hydrogel surfaces with isotropicmicrostructures can facilitate the superspreading of water droplets, which canbe realized within 500 ms in the absence of external forces. Furthermore,directional superspreading and the flow of water droplets are realized underthe guidance of anisotropic microgrooves. Such a unique spreading behaviorcan also be observed on the hydrogel surfaces with various shapedmicrochannels, such as periodic, bent, shunted, divergent, and confluentmorphologies, which have potential for the development of open microfluidicplatforms for various healthcare-related applications. 收起