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Noncontact All‐In‐Situ Reversible Reconfiguration of Femtosecond Laser‐Induced Shape Memory Magnetic Microcones for Multifunctional Liquid Droplet Manipulation and Information Encryption
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2021-03-12 , DOI: 10.1002/adfm.202100543 Chuanzong Li 1 , Yunlong Jiao 2 , Yiyuan Zhang 3 , Shaojun Jiang 3 , Xiaodong Lv 1 , Sizhu Wu 1, 4 , Jiawen Li 3 , Yanlei Hu 3 , Jiaxin Ye 2 , Kun Liu 2 , Dong Wu 3 , Jiaru Chu 3
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2021-03-12 , DOI: 10.1002/adfm.202100543 Chuanzong Li 1 , Yunlong Jiao 2 , Yiyuan Zhang 3 , Shaojun Jiang 3 , Xiaodong Lv 1 , Sizhu Wu 1, 4 , Jiawen Li 3 , Yanlei Hu 3 , Jiaxin Ye 2 , Kun Liu 2 , Dong Wu 3 , Jiaru Chu 3
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Shape memory polymers can change their shapes in a controlled way under external stimuli and thus promote the development of smart devices, soft robotics, and microfluidics. Here, a kind of iron particles (IPs) doped shape memory microcone is developed for noncontact all‐in‐situ reversible tuning between the tilted and upright state under near‐infrared (NIR) irradiation and magnetic field (MF) actuation. The magnetic microcones are simply fabricated by a laser‐ablated replica‐molding strategy so that their height can be precisely controlled by adjusting the laser machining parameters. In addition, it is found that the droplets can be transported unidirectionally on the tilted microcones, which is related to the variation of the adhesion force induced by the length of the triple contact line (TCL). Finally, other multifunctional applications have also been realized, such as, selective droplet release, information encryption, rewritable display, and reusable temperature switch. This work may provide a facile strategy for developing multiresponsive smart devices based on shape memory polymers.
中文翻译：
飞秒激光诱导的形状记忆磁性微锥的非接触式原位可逆重构，用于多功能液滴操纵和信息加密
形状记忆聚合物可以在外部刺激下以受控方式改变其形状，从而促进智能设备，软机器人技术和微流体技术的发展。在这里，开发了一种掺杂铁颗粒（IPs）的形状记忆微锥，用于在近红外（NIR）辐射和磁场（MF）激励下在倾斜和直立状态之间进行非接触式原位可逆调谐。磁性微锥是通过激光烧蚀复制模制策略简单制造的，因此可以通过调整激光加工参数来精确控制其高度。另外，发现液滴可以在倾斜的微锥上单向运输，这与由三重接触线（TCL）的长度引起的粘附力的变化有关。最后，还实现了其他多功能应用程序，例如选择性液滴释放，信息加密，可重写显示和可重复使用的温度开关。这项工作可以为基于形状记忆聚合物开发多响应智能设备提供一种简便的策略。
更新日期：2021-05-17
中文翻译：
飞秒激光诱导的形状记忆磁性微锥的非接触式原位可逆重构，用于多功能液滴操纵和信息加密
形状记忆聚合物可以在外部刺激下以受控方式改变其形状，从而促进智能设备，软机器人技术和微流体技术的发展。在这里，开发了一种掺杂铁颗粒（IPs）的形状记忆微锥，用于在近红外（NIR）辐射和磁场（MF）激励下在倾斜和直立状态之间进行非接触式原位可逆调谐。磁性微锥是通过激光烧蚀复制模制策略简单制造的，因此可以通过调整激光加工参数来精确控制其高度。另外，发现液滴可以在倾斜的微锥上单向运输，这与由三重接触线（TCL）的长度引起的粘附力的变化有关。最后，还实现了其他多功能应用程序，例如选择性液滴释放，信息加密，可重写显示和可重复使用的温度开关。这项工作可以为基于形状记忆聚合物开发多响应智能设备提供一种简便的策略。
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