Active elastocapillarity in soft solids with negative surface tension.
Active elastocapillarity in soft solids with negative surface tension.
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DOI：
10.1126/sciadv.abk3079
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发表时间：
2022-03-11
期刊：
影响因子：
13.6
通讯作者：
Souslov A
中科院分区：
文献类型：
--
作者：
Binysh J;Wilks TR;Souslov A
活性固体消耗能量以允许致动、形状改变和在平衡中不可能的波传播。尽管许多实验系统已经实现了主动界面，但三维（3D）散装材料的控制仍然是一个挑战。在这里，我们开发了连续介质理论和微观模拟，描述了一个三维软固体的边界经历主动表面应力。活动边界和弹性体之间的竞争产生了广泛的以前未探索的现象，这是所谓的活动弹性毛细现象的演示。与薄壳和囊泡相比，我们发现，大体积3D弹性控制不同各向异性形状之间的过渡。这些转变在一个临界点相遇，从而允许通过朗道理论进行普遍分类。此外，活动表面修改弹性波传播，以允许零，甚至负，群速度。这些现象为将形状变化和功能编程到活性固体中提供了强大的原则，从机器人超材料到形状变化的纳米颗粒。主动表面应力将形状和功能编程为3D弹性实体。
Active solids consume energy to allow for actuation, shape change, and wave propagation not possible in equilibrium. Whereas active interfaces have been realized across many experimental systems, control of three-dimensional (3D) bulk materials remains a challenge. Here, we develop continuum theory and microscopic simulations that describe a 3D soft solid whose boundary experiences active surface stresses. The competition between active boundary and elastic bulk yields a broad range of previously unexplored phenomena, which are demonstrations of so-called active elastocapillarity. In contrast to thin shells and vesicles, we discover that bulk 3D elasticity controls snap-through transitions between different anisotropic shapes. These transitions meet at a critical point, allowing a universal classification via Landau theory. In addition, the active surface modifies elastic wave propagation to allow zero, or even negative, group velocities. These phenomena offer robust principles for programming shape change and functionality into active solids, from robotic metamaterials down to shape-shifting nanoparticles. Active surface stresses program shape and function into 3D elastic solids.
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影响因子：
2.4
作者：
Jagota, Anand;Paretkar, Dadhichi;Ghatak, Animangsu
通讯作者：
Ghatak, Animangsu
DOI：
10.1088/0305-4470/35/30/302
发表时间：
2002-08-02
期刊：
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
影响因子：
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作者：
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通讯作者：
Guven, J
影响因子：
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作者：
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通讯作者：
Marchetti, M. C.
影响因子：
8.6
作者：
Jimenez, Francisco Lopez;Stoop, Norbert;Reis, Pedro M.
通讯作者：
Reis, Pedro M.
影响因子：
2.9
作者：
BOAL, DH;RAO, M
通讯作者：
RAO, M