Localized Self- Growth of Reconfigurable Architectures Induced by a Femtosecond Laser on a Shape-Memory Polymer
Localized Self- Growth of Reconfigurable Architectures Induced by a Femtosecond Laser on a Shape-Memory Polymer
复制标题
飞秒激光在形状记忆聚合物上诱导的可重构结构的局部自生长
DOI：
10.1002/adma.201803072
复制
发表时间：
2018
影响因子：
29.4
通讯作者：
Chu Jiaru
中科院分区：
文献类型：
--
作者：
Zhang Yachao;Li Ying;Hu Yanlei;Zhu Xuelin;Huang Yaowei;Zhang Zhen;Rao Shenglong;Hu Zhijiang;Qiu Weixin;Wang Yulong;Li Guoqiang;Yang Liang;Li Jiawen;Wu Dong;Huang Wenhao;Qiu Chengwei;Chu Jiaru
自然生物体，特别是植物的结构在很大程度上决定了它们对不同外部条件的反应。几十年来，由于在智能纺织品、致动器、软机器人和药物输送方面的广泛应用，人工材料的自然启发形状变换一直激励着学术研究。介绍了一种控制飞秒激光在预拉伸形状记忆聚合物表面扫描实现微尺度局域化可重构结构转换的“自生长”方法。结果发现，微结构可以生长出原来的表面，通过故意控制的局部激光加热和烧蚀，并得到的结构可以进一步调整，通过采用非对称的激光扫描策略。通过将灵活和可编程的激光技术与智能形状记忆聚合物相结合，展示了可重构架构的杰出范例。分别在信息加密/解密和微目标捕获/释放方面进行了概念验证实验。研究结果揭示了具有智能表面的建筑在各个跨学科领域的新能力，包括防伪，微结构印刷和超灵敏检测。
Architectures of natural organisms especially plants largely determine their response to varying external conditions. Nature‐inspired shape transformation of artificial materials has motivated academic research for decades due to wide applications in smart textiles, actuators, soft robotics, and drug delivery. A “self‐growth” method of controlling femtosecond laser scanning on the surface of a prestretched shape‐memory polymer to realize microscale localized reconfigurable architectures transformation is introduced. It is discovered that microstructures can grow out of the original surface by intentional control of localized laser heating and ablation, and resultant structures can be further tuned by adopting an asymmetric laser scanning strategy. A distinguished paradigm of reconfigurable architectures is demonstrated by combining the flexible and programmable laser technique with a smart shape‐memory polymer. Proof‐of‐concept experiments are performed respectively in information encryption/decryption, and microtarget capturing/release. The findings reveal new capacities of architectures with smart surfaces in various interdisciplinary fields including anti‐counterfeiting, microstructure printing, and ultrasensitive detection.