State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Sichuan, 610065, P. R. China.
ETH Zurich, Department of Health Science and Technology, Schmelzbergstrasse 9, LFO E23, Zurich, 8092, Switzerland.
Adv Sci (Weinh). 2023 Mar;10(9):e2206867. doi: 10.1002/advs.202206867. Epub 2023 Jan 25.
Amyloid fibrils have generated steadily increasing traction in the development of natural and artificial materials. However, it remains a challenge to construct bulk amyloid films directly from amyloid fibrils due to their intrinsic brittleness. Here, a facile and general methodology to fabricate macroscopic and tunable amyloid films via fast electrostatic self-assembly of amyloid fibrils at the air-water interface is introduced. Benefiting from the excellent templating properties of amyloid fibrils for nanoparticles (such as conductive carbon nanotubes or magnetic Fe O nanoparticles), multifunctional amyloid films with tunable properties are constructed. As proof-of-concept demonstrations, a magnetically oriented soft robotic swimmer with well-confined movement trajectory is prepared. In addition, a smart magnetic sensor with high sensitivity to external magnetic fields is fabricated via the combination of the conductive and magnetic amyloid films. This strategy provides a convenient, efficient, and controllable approach for the preparation of amyloid-based multifunctional films and related smart devices.
淀粉样纤维在天然和人工材料的开发中产生了越来越大的吸引力。然而，由于其内在的脆性，直接从淀粉样纤维构建大块淀粉样纤维膜仍然是一个挑战。在这里，我们介绍了一种通过在气-液界面快速静电自组装淀粉样纤维来制备宏观且可调的淀粉样纤维膜的简单通用方法。得益于淀粉样纤维对纳米颗粒（如导电碳纳米管或磁性 Fe O 纳米颗粒）的优异模板性能，构建了具有可调性能的多功能淀粉样纤维膜。作为概念验证的演示，我们制备了一种具有良好限定运动轨迹的磁性定向软体机器人游泳者。此外，通过导电和磁性淀粉样纤维膜的结合，制备了一种对外磁场具有高灵敏度的智能磁传感器。该策略为基于淀粉样蛋白的多功能薄膜及相关智能器件的制备提供了一种简便、高效、可控的方法。
