Patterned conducting polymer films with unique structures have promising prospects for application in various fields, such as actuation, water purification, sensing, and bioelectronics. However, their practical application is hindered because of the limitations of existing construction methods. Herein, a strategy is proposed for the superhydrophobic-substrate-assisted construction of free-standing 3D microcavity-patterned conducting polymer films (McPCPFs) at micrometer resolution. Easy-peeling and nondestructive transfer properties are achieved through electrochemical polymerization along the solid/liquid/gas triphase interface on micropillar-structured substrates. The effects of the wettability and geometrical parameters of the substrates on the construction of McPCPFs are systematically investigated in addition to the evolution of the epitaxial growth along the triphase interface at different polymerization times. The McPCPFs can be easily peeled from superhydrophobic surfaces using ethanol because of weak adhesion and nondestructively transferred to various substrates taking advantage of the capillarity. Furthermore, sensitive light-driven McPCPF locomotion on organic liquid surfaces is demonstrated. Ultimately, a facile strategy for the construction of free-standing 3D microstructure-patterned conducting polymer films is proposed, which can improve productivity and applicability of the films in different fields and expand the application scope of superwettable interfaces.

中文翻译：

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超疏水基底辅助构建独立式微腔图案化导电聚合物薄膜

具有独特结构的图案化导电聚合物薄膜在驱动、水净化、传感和生物电子等领域具有广阔的应用前景。然而，由于现有施工方法的限制，其实际应用受到阻碍。在此，提出了一种以微米分辨率超疏水基底辅助构建独立式 3D 微腔图案导电聚合物薄膜 (McPCPF) 的策略。通过沿着微柱结构基材上的固/液/气三相界面进行电化学聚合，实现了易剥离和无损转移特性。除了不同聚合时间下沿三相界面的外延生长的演化之外，还系统地研究了基底的润湿性和几何参数对 McPCPF 结构的影响。由于粘附力较弱，McPCPF 可以使用乙醇轻松从超疏水表面剥离，并利用毛细管现象无损地转移到各种基材上。此外，还演示了有机液体表面上敏感的光驱动 McPCPF 运动。最终，提出了一种构建自支撑3D微结构图案导电聚合物薄膜的简便策略，可以提高薄膜在不同领域的生产率和适用性，并扩大超润湿界面的应用范围。