Programmed Locomotion of an Active Gel Driven by Spiral Waves
Programmed Locomotion of an Active Gel Driven by Spiral Waves
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螺旋波驱动的活性凝胶的程序化运动
DOI：
10.1002/anie.202000110
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Irving R Epstein
中科院分区：
文献类型：
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作者：
Lin Ren;Liyuan Wang;Qingyu Gao;Rui Teng;Ziyang Xu;Jing Wang;Changwei Pan;Irving R Epstein
活跃的媒体，主机螺旋波可以显示复杂的运动模式，这些波的动力学驱动。我们使用一个模型的光敏刺激响应凝胶，支持螺旋化学波的传播，研究机车过渡和编程运动。圆形和环形运动之间的模式转换的结果从螺旋尖端曲折的发病，产生通过二次霍普夫分叉的照明水平的增加。系统的这种动态不稳定性引入了由尖端曲折引起的具有小直径的第二圆形运动。初始的大直径圆形运动是由凝胶一角的简单螺旋波的波前和波后的推拉不对称性驱动的。通过利用这种模式转换的凝胶运动通过编码照明，我们设计了可编程的自然启发的角度运动的凝胶路径。
Active media that host spiral waves can display complex modes of locomotion driven by the dynamics of those waves. We use a model of a photosensitive stimulus-responsive gel that supports the propagation of spiral chemical waves to study locomotive transition and programmed locomotion. The mode transition between circular and toroidal locomotion results from the onset of spiral tip meandering that arises via a secondary Hopf bifurcation as the level of illumination is increased. This dynamic instability of the system introduces a second circular locomotion with a small diameter caused by tip meandering. The original circular locomotion with large diameter is driven by the push-pull asymmetry of the wavefront and waveback of the simple spiral waves initiated at one corner of gel. By harnessing this mode transition of the gel locomotion via coded illumination, we design programmable pathways of nature-inspired angular locomotion of the gel.