Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China.
Small. 2020 May;16(18):e2000043. doi: 10.1002/smll.202000043. Epub 2020 Apr 19.
Long-distance wireless actuation indicates precise remote control over materials, sensors, and devices that are widely utilized in biomedical, defence, disaster relief, deep ocean, and outer space applications to replace human work. Unlike radio frequency (RF) control, which has low tolerance toward electromagnetic interference (EMI), light control represents a promising method to overcome EMI. Nonetheless, long-distance light-controlled wireless actuation able to compete with RF control has not been achieved until now due to the lack of highly light-sensitive actuator designs. Here, it is demonstrate that amyloid-like protein aggregates can organize photomodule single-layer reduced graphene oxide (rGO) into a well-defined multilayer stack to display long-distance photoactuation. The amyloid-like proteinaceous component docks the rGO layers together to form a hybrid film, which can reliably adhere onto various material surfaces with robust interfacial adhesion. The sensitive photothermal effect and a fast bending in 1 s to switch a circuit are achieved after forming the film on a plastic substrate and irradiating the bilayer film with a blue laser from 100 m away. A photoactuation distance of 50 km can be further extrapolated based on a commercial high-power laser. This study reveals the great potential of amyloid-like aggregates in remote light control of robots and devices.
远程无线驱动指示着对材料、传感器和设备的精确远程控制，这些在生物医学、国防、灾难救援、深海和外太空应用中被广泛应用，以取代人类工作。与对电磁干扰（EMI）容忍度低的射频（RF）控制不同，光控制代表了一种有前途的克服 EMI 的方法。然而，由于缺乏高灵敏度执行器设计，直到现在，能够与 RF 控制相竞争的长距离光控无线驱动还没有实现。在这里，研究表明类淀粉样蛋白聚集物可以将光模块单层还原氧化石墨烯（rGO）组织成定义明确的多层堆叠，以显示长距离光驱动。类淀粉样蛋白成分将 rGO 层固定在一起，形成一种混合薄膜，该薄膜可以可靠地附着在各种材料表面上，具有强大的界面附着力。在塑料基板上形成薄膜后，用 100 m 外的蓝色激光照射双层薄膜，即可实现灵敏的光热效应和 1 s 内快速弯曲以切换电路。根据商业高功率激光器，还可以进一步推断出 50 km 的光驱动距离。这项研究揭示了类淀粉样聚集物在远程光控机器人和设备方面的巨大潜力。
