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Feedback-controlled hydrogels with homeostatic oscillations and dissipative signal transduction
Nature Nanotechnology ( IF 38.3 ) Pub Date : 2022-11-28 , DOI: 10.1038/s41565-022-01241-x
Hang Zhang 1 , Hao Zeng 2 , Amanda Eklund 1 , Hongshuang Guo 2 , Arri Priimagi 2 , Olli Ikkala 1
Affiliation  

Driving systems out of equilibrium under feedback control is characteristic for living systems, where homeostasis and dissipative signal transduction facilitate complex responses. This feature not only inspires dissipative dynamic functionalities in synthetic systems but also poses great challenges in designing novel pathways. Here we report feedback-controlled systems comprising two coupled hydrogels driven by constant light, where the system can be tuned to undergo stable homeostatic self-oscillations or damped steady states of temperature. We demonstrate that stable temperature oscillations can be utilized for dynamic colours and cargo transport, whereas damped steady states enable signal transduction pathways. Here mechanical triggers cause temperature changes that lead to responses such as bending motions inspired by the single-touch mechanoresponse in Mimosa pudica and the frequency-gated snapping motion inspired by the plant arithmetic in the Venus flytrap. The proposed concepts suggest generalizable feedback pathways for dissipative dynamic materials and interactive soft robotics.



中文翻译:

具有稳态振荡和耗散信号转导的反馈控制水凝胶

在反馈控制下驱动系统失去平衡是生命系统的特征,其中体内平衡和耗散信号转导促进复杂的反应。这一特征不仅激发了合成系统中的耗散动态功能,而且对设计新途径提出了巨大挑战。在这里,我们报告了包含两个由恒定光驱动的耦合水凝胶的反馈控制系统,其中可以调整系统以进行稳定的稳态自振荡或阻尼稳态温度。我们证明稳定的温度振荡可用于动态颜色和货物运输,而阻尼稳态可实现信号转导通路。含羞草和受维纳斯捕蝇草中植物算法启发的频率门控捕捉运动。所提出的概念为耗散动态材料和交互式软机器人提出了可推广的反馈途径。

更新日期:2022-11-28
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