The precise control of crack propagation at bonded interfaces is crucial for smart adhesives with advanced performance. However, previous studies have primarily concentrated on either microscale or macroscale crack propagation. Here, we present a hybrid adhesive that integrates microarchitectures and macroscopic nonlinear cut architectures for unparalleled adhesion control. The integration of these architectural elements enables conformal attachment and simultaneous crack trapping across multiple scales for high capacity, enhancing adhesion by more than 70×, while facilitating crack propagation at the macroscale in specific directions for programmable release and reusability. As adhesion strength and directionality can be independently controlled at any location, skin adhesive patches are created that are breathable, nondamaging, and exceptionally strong and secure yet remove easily. These capabilities are demonstrated with a skin-mounted adhesive patch with integrated electronics that accurately detects human motion and wirelessly transmits signals, enabling real-time control of avatars in virtual reality applications.

中文翻译：

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用于可编程胶粘剂的多尺度裂纹捕获


精确控制粘合界面处的裂纹扩展对于具有先进性能的智能胶粘剂至关重要。然而，以前的研究主要集中在微观或宏观裂纹扩展上。在这里，我们介绍了一种混合胶粘剂，它集成了微架构和宏观非线性切割架构，可实现无与伦比的粘合控制。这些建筑元件的集成实现了跨多个尺度的保形附着和同步裂缝捕获，以实现高容量，将附着力提高 70 ×以上，同时促进裂纹在宏观尺度上沿特定方向扩展，以实现可编程释放和可重用性。由于可以在任何位置独立控制粘合强度和方向性，因此创建了透气、无损伤、非常坚固和安全且易于去除的皮肤胶粘剂贴片。这些功能通过带有集成电子设备的贴肤胶粘剂贴片进行演示，该贴片可准确检测人体运动并无线传输信号，从而在虚拟现实应用中实现对虚拟形象的实时控制。