Hunan Province Key Laboratory of Advanced Carbon Materials and Applied Technology, College of Materials Science and Engineering , Hunan University , Changsha 410082 , China.
ACS Appl Mater Interfaces. 2019 Mar 13;11(10):10218-10225. doi: 10.1021/acsami.8b22099. Epub 2019 Mar 4.
Synthetic soft actuators with the integration of fast response speed, large-scale displacement, and precise control over deformation direction are highly demanded for implementing agile and precise mechanical movements in smart robots, artificial muscles, and biomimetic devices. In this work, ultrafast yet controllable all-carbon actuators are created based on graphene oxide and oriented carbon nanotubes. This all-carbon actuator shows humidity- and near infrared light-induced actuation with unprecedented performance integration, including ultrafast response (0.08 s), ultralarge deformation (angle change per length 70 °/mm), on-demand control over deformation direction (directional bending and chiral twisting), and high reversibility (no detectable fatigue after 10 000 cycles). Impressively, the remarkable actuation performances allow the all-carbon actuator to implement diverse unusual movements, including light-triggered jumping vertically at a speed of 250 mm/s, rolling horizontally at a speed of 12 mm/s, throwing an object at a speed of 505 mm/s, arresting a high-speed object (335 mm/s), as well as humidity-triggered lifting of an object instantly (0.34 s).
具有快速响应速度、大位移和对变形方向精确控制的合成软致动器，对于在智能机器人、人工肌肉和仿生装置中实现敏捷和精确的机械运动，有着很高的需求。在这项工作中，基于氧化石墨烯和定向碳纳米管，创建了超快速但可控的全碳致动器。这种全碳致动器具有前所未有的性能集成，包括湿度和近红外光致动，具有超快的响应速度（0.08 秒）、超大的变形（每长度的角度变化 70°/毫米）、对变形方向的按需控制（定向弯曲和手性扭曲）和高的可逆性（10000 次循环后无明显疲劳）。令人印象深刻的是，显著的致动性能使得全碳致动器能够实现多种不同寻常的运动，包括光触发的垂直跳跃速度为 250 毫米/秒，水平滚动速度为 12 毫米/秒，以 505 毫米/秒的速度投掷物体，停止高速物体（335 毫米/秒），以及湿度触发的物体瞬间提升（0.34 秒）。
