Sharing of Strain Between Nanofiber Forests and Liquid Crystals Leads to Programmable Responses to Electric Fields

Sharing of Strain Between Nanofiber Forests and Liquid Crystals Leads to Programmable Responses to Electric Fields
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纳米纤维森林和液晶之间的应变共享导致对电场的可编程响应

DOI:
10.1002/adfm.202200830
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发表时间:
2022
影响因子:
19
通讯作者:
Abbott, Nicholas L.
Abbott, Nicholas L.
中科院分区:
材料科学1区
文献类型:
--
作者:
Roh, Sangchul;Kim, John;Varadharajan, Divya;Lahann, Joerg;Abbott, Nicholas L.

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嵌入软基质中的纤维在生物系统中广泛存在,这些纤维提供机械强化或形状变化指令的编码。在这里,探索了末端附着的聚合物纳米纤维林和液晶(LC)的机械耦合,其中纳米纤维通过液晶支撑膜中的对环芳基单体的化学气相聚合被模板化成规定的形状。结果表明,纳米纤维和液晶的弹性能在大小上相当,通过对液晶施加电场导致纳米纤维发生可逆应变。这种耦合被证明可以在液晶中编码复杂的电光响应(例如光学涡旋),从而说明了液晶模板纳米纤维森林如何为软材料中的配置变化的编程提供新方法的基础。
Fibers embedded in soft matrices are widely encountered in biological systems, with the fibers providing mechanical reinforcement or encoding of instructions for shape changes. Here, the mechanical coupling of end‐attached polymeric nanofiber forests and liquid crystals (LCs) is explored, where the nanofibers are templated into prescribed shapes by the chemical vapor polymerization of paracyclophane‐based monomers in supported films of the LCs. It is shown that the elastic energies of the nanofibers and LCs are comparable in magnitude, leading to reversible straining of nanofibers via the application of an electric field to the LC. This coupling is shown to encode complex electrooptical responses in the LC (e.g., optical vortices), thus illustrating how LC‐templated nanofiber forests offer the basis of fresh approaches for programming configurational changes in soft materials.
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