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首页> 外文期刊>ACS applied materials & interfaces >Reconfigurable Photonic Crystals Enabled by Multistimuli-Responsive Shape Memory Polymers Possessing Room Temperature Shape Processability
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Reconfigurable Photonic Crystals Enabled by Multistimuli-Responsive Shape Memory Polymers Possessing Room Temperature Shape Processability

机译：通过具有室温形状可加工性的多级敏敏形状记忆聚合物使能的可重新配置的光子晶体

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摘要

Traditional shape memory polymers (SMPs) are mostly thermoresponsive, and their applicationS in nano-optics are hindered by heat-demanding programming and recovery processes. By integrating a polyurethane-based shape memory copolymer with templating nanofabrication, reconfigurable/rewritable macroporous photonic crystals have been demonstrated. This SMP coupled with the unique macroporous structure enables unusual all-room-temperature shape memory cycles. "Cold" programming involving microscopic order disorder transitions of the templated macropores is achieved by mechanically deforming the macroporous SMP membranes. The rapid recovery of the permanent, highly ordered photonic crystal structure from the temporary, disordered configuration can be triggered by multiple stimuli including a large variety of vapors and solvents, heat, and microwave radiation. Importantly, the striking chromogenic effects associated with these athermal and thermal processes render a sensitive and noninvasive optical methodology for quantitatively characterizing the intriguing nanoscopic shape memory effects. Some critical parameters/rnechanisms that could significantly affect the final performance of SMP-based reconfigurable photonic crystals including strain recovery ratio, dynamics and reversibility of shape recovery, as well as capillary condensation of vapors in inacropores, which play a crucial role in vapor-triggered recovery, can be evaluated using this new optical technology.
机译：传统形状记忆聚合物（SMPS）主要是热响应性，并且它们在纳米光学中的应用受到热苛刻的编程和恢复过程的阻碍。通过将基于聚氨酯的形状记忆共聚物与模板纳米制备结合，已经证明了可重新配置/可重写的大孔光子晶体。该SMP与独特的大孔结构相结合，可以实现不寻常的全室温形状记忆循环。通过机械变形大孔SMP膜来实现涉及模板化巨大的微观订单障碍转变的“冷”编程。永久性，高度有序的光子晶体结构的快速恢复，可以通过多种刺激，包括大量蒸汽和溶剂，热和微波辐射来触发多种刺激。重要的是，与这些滴注室和热处理相关的醒目的发色效应使得敏感和非侵入性的光学方法，用于定量表征有趣的纳米镜形状记忆效应。一些关键参数/ rnechisisms，可以显着影响基于SMP的可重新配置光子晶体的最终性能，包括应变恢复比，动力学和形状回收的可逆性，以及在内部蒸汽中蒸气的毛细血管缩合，这在蒸汽触发中起着至关重要的作用恢复，可以使用这种新的光学技术进行评估。

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