Hefei University of Technology has learned that the school successfully developed a new type of carbon nanotube flexible thin-film intelligent driver that can generate large deformation under low voltage and sunlight irradiation, and simulates human hand movements of the “flicking fingersâ€. A flexible "robot" that produces jumping motion under external light stimulation, which was recently published in the "Advanced Functional Materials", an important international academic journal.
The flexible intelligent driver can convert the external energy such as light, electricity, heat, and humidity directly into the mechanical deformation of the device itself without having to pass the cumbersome energy conversion device, thus attracting scientists' extensive research interests. However, the study of flexible actuators with simple structures, rapid large deformation, multi-source response, and the ability to simulate complex motions such as flight and jumping still faces many challenges.
The research team of Hefei University of Technology collaborated with the Suzhou Nanotechnology Institute of the Chinese Academy of Sciences to design and prepare a curled carbon nanotube/polymer bilayer film driver that can produce rapid and large shapes from tubular to flat under low voltage and light irradiation. Distorted, and returned to the original curled shape after the electrical signal or illumination was removed. Researchers have simulated the “thumbs†of the thumb and middle finger by overlapping the two ends of the driver, thus constructing a light-driven jump “robotâ€. The selective asymmetrical deformation of the two ends of the robot under illumination results in the accumulation and instantaneous release of elastic potential energy, resulting in a jumping movement with a height that is more than five times its own height, accompanied by air rolling. By changing the direction of incident light, the robot can also produce periodic swing motions similar to tumblers.
"The jumping motion involves energy storage and instantaneous release. The flexible bionic intelligent drive material device does not need to accumulate, store, and rapidly release energy through structural designs such as springs and gears. It provides a brand-new way to achieve jumping motion." Hefei Hu Ying, a researcher at Gongda University, said that they have further developed crawler robots, bionic robots, and bionic flowers that can bloom under sunlight. This achievement has a wide range of applications in smart bionics, flexible sensing and other fields.
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