Light-driven actuators based on polymer films
Light-driven actuators based on polymer films
复制标题
基于聚合物薄膜的光驱动执行器
DOI：
10.1117/1.2185093
复制
发表时间：
2006
影响因子：
1.3
通讯作者：
G. Adamovsky
中科院分区：
文献类型：
--
作者：
S. Sarkisov;M. Curley;L. Huey;A. Fields;G. Adamovsky
我们描述了基于聚合物聚偏氟乙烯薄膜(PVDF)的新型光驱动致动器。该致动器利用低功率(10 mW及以下)激光辐射引起的聚合物薄膜的光机械弯曲。光机械效应结合了各种物理机制，如热膨胀、逆压电机制、光伏和热释电机制，而热膨胀机制占主导地位。致动器施加在外部物体上的力是用扭力天平测量的。它与激光的功率成正比，对于用10 mW激光照射的50微米薄膜，它可以高达10-4N。我们演示了1×7 mm带状致动器在0.3 kHz频率下的机械振动。作为可能的应用实例，演示了一种可以驱动传统机械时钟内部工作的闭环运动的光子开关和致动器。所提出的致动器有可能被用作未来光驱动微纳米系统的推进部件。
We describe new light-driven actuators based on films of polymer polyvinylidene fluoride, known as PVDF. The actuators employ the photomechanic bending of the polymer film caused by low-power (10 mW and less) laser radiation. The photomechanic effect combines various physical mechanisms, such as thermal expansion, the converse piezoelectric mechanism, and the photovoltaic and pyroelectric mechanisms, while the mechanism of thermal expansion is dominant. The force applied by the actuators to external objects is measured with a torsion balance. It is proportional to the power of laser beam and could be as high as 10–4 N for a 50-µm film illuminated with a 10-mW laser beam. We demonstrate mechanical vibrations of a 1×7-mm strip actuator at a frequency of 0.3 kHz. As examples of possible applications, a photonic switch and an actuator with a closed-loop motion that could drive the inner workings of a conventional mechanical clock were demonstrated. The proposed actuators have a potential of being used as propulsion components of future light-driven micro/nano systems.