期刊
ACS NANO
卷 15, 期 8, 页码 12826-12835出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c03950
关键词
MXene; paraffin wax; flexible actuator; phase transition; bionic robots; camouflage; information delivery
类别
资金
- National Natural Science Foundation of China [51802008, 61735002]
- Beijing Nova Program [Z20110006820111]
- Beijing Natural Science Foundation [Z180015]
- General project of Beijing Municipal Education Commission [KM201910005014]
- State Key Laboratory of New Ceramic and Fine Processing Tsinghua University [KF202003]
This study introduces a flexible actuator based on paraffin wax and Ti3C2Tx MXene film composite, which shows excellent actuation performance and the ability to trigger robot motion and dynamic camouflage through light and infrared radiation.
Due to their high flexibility and adaptability, bionic robots have great potential in applications such as healthcare, rescue, and surveillance. The flexible actuator is an essential component of the bionic robot and determines its performance. Even though much progress has been achieved in bionic robot research, there still exists a great challenge in preparing a flexible actuator with a large stroke, high sensitivity, fast response, low triggering power, and long lifetime. This study presents a flexible actuator based on a paraffin wax and Ti3C2Tx MXene (PW-MX) film composite. Such a flexible actuator delivers an excellent actuation performance, including a large curvature change (2.2 x 10(2) m(-1)), high thermal sensitivity (4.6 m(-1)/degrees C), low triggering power of light (76 mW/cm(2)), wavelength selectivity, fast response (0.38 s), and long lifetime (>20000 cycles). Due to the high thermal sensitivity and the strong infrared absorption of the PW-MX film, crawling motion of an inchworm robot based on PW-MX film can be triggered by infrared irradiation from the human finger. To mimic living organisms with bioluminescence, we prepared a PW-MX actuator with green fluorescence by doping PW-MX film with CdSe/ZnS quantum dots. The integration of luminescent function enables the PW-MX actuator to deliver information under light stimulation and to camouflage under a background of green foliage actively. With its merits of ease of fabrication and high actuation performance, the flexible PW-MX actuator is expected to lend itself to more applications in the future.
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