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Carnivorous plants inspired shape-morphing slippery surfaces
食肉植物启发的光滑形状变形表面
食肉植物に触発された形状変形平滑表面
육식 식물이 계발하는 형상은 변형되고 매끄러운 표면이다
Superficie lisa deformada inspirada por plantas carnívoras
Les formes inspirées par les carnivores déforment les surfaces lisses
плотоядные растения вдохновляют гладкую поверхность
Dong-Dong Han 韩冬冬 ¹, Yong-Lai Zhang 张永来 ¹, Zhao-Di Chen 陈招弟 ¹, Ji-Chao Li 李纪超 ¹, Jia-Nan Ma 马佳楠 ¹, Jiang-Wei Mao 毛江维 ¹, Hao Zhou ¹, Hong-Bo Sun 孙洪波 ²
¹ State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
中国 长春 吉林大学电子科学与工程学院 集成光电子学国家重点实验室
² State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China
中国 北京 清华大学精密仪器系 精密测试技术及仪器国家重点实验室
Opto-Electronic Advances, 25 August 2022
Abstract

Carnivorous plants, for instance, Dionaea muscipula and Nepenthes pitcher plant, inspired the innovation of advanced stimuli-responsive actuators and lubricant-infused slippery surfaces, respectively. However, hybrid bionic devices that combine the active and passive prey trapping capabilities of the two kinds of carnivorous plants remain a challenge. Herein, we report a moisture responsive shape-morphing slippery surface that enables both moisture responsive shape-morphing and oil-lubricated water repellency for simultaneous active- and passive-droplet manipulation.

The moisture deformable slippery surface is prepared by creating biomimetic microstructures on graphene oxide (GO) membrane via femtosecond laser direct writing and subsequent lubricating with a thin layer of oil on the laser structured reduced GO (LRGO) surface. The integration of a lubricant-infused slippery surface with an LRGO/GO bilayer actuator endows the actuator with droplet sliding ability and promotes the moisture deformation performance due to oil-enhanced water repellency of the inert layer (LRGO).

Based on the shape-morphing slippery surface, we prepared a series of proof-of-concept actuators, including a moisture-response Dionaea muscipula actuator, a smart frog tongue, and a smart flower, demonstrating their versatility for active/passive trapping, droplet manipulation, and sensing.
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