Smart manipulation of liquid/bubble transport has garnered widespread attention due to its potential applications in many fields. Designing a responsive surface has emerged as an effective strategy for achieving controllable transport of liquids/bubbles. However, it is still challenging to fabricate stable amphibious responsive surfaces that can be used for the smart manipulation of liquid in air and bubbles underwater. Here, amphibious slippery surfaces are fabricated using magnetically responsive soft poly(dimethylsiloxane) doped with iron powder and silicone oil. The slippery gel surface retains its magnetic responsiveness and demonstrates strong affinity for bubbles underwater but shows small and switching resistance forces with the water droplets in air and bubbles underwater, which is the key factor for achieving the controllable transport of liquids/bubbles. On the slippery gel surface, the sliding behaviors of water droplets and bubbles can be reversibly controlled by alternately applying/removing an external magnetic field. Notably, compared with slippery liquid-infused porous surfaces, the slippery gel surface demonstrates outstanding stability, whether in air or underwater, even after 100 cycles of alternately applying/removing the magnetic field. This surface shows potential applications in gas/liquid microreactors, gas-liquid mixed fluid transportation, bubble/droplet manipulation, etc.

Smart responsive slippery surfaces are highly desirable for their potential applications in many fields. Although slippery surfaces that respond to a single external stimulus are reported, challenges in fabricating synergetic responsive anisotropic slippery surfaces remain due to limitations in the preparation of the underlying anisotropic substrate. Here, photoelectric synergetic responsive slippery surfaces are fabricated based on anisotropic porous films that are tailored by using an interfacial directional freezing technique using a poly(3‐hexylthiophene‐2,5‐diyl)/[6,6]‐phenyl‐C61‐butyric acid methyl ester (P3HT/PCBM) binary system. The anisotropic surface structure of P3HT/PCBM films is facilely tailored by simply tuning the freezing speed, the P3HT/PCBM mass ratio, and the total concentration of solution. A detailed formation mechanism is proposed and elucidated. Moreover, anisotropic slippery surfaces demonstrate remarkable photoelectric synergetic behavior, which is used for the photoelectric synergetic control of droplet sliding and interfacial sentinel oxidative degradation. The in‐depth understanding of the formation mechanism of the anisotropic porous film may enable the interfacial directional freezing method to be extended to the design of other multifunctional anisotropic surfaces. This work will provide a theoretical basis for the design of new types of smart slippery surfaces, which are potentially useful in microfluidics, lab‐on‐chips, photoelectric displays, interfacial microreactors, and other related fields.

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