期刊
ADVANCED MATERIALS TECHNOLOGIES
卷 7, 期 8, 页码 -出版社
WILEY
DOI: 10.1002/admt.202200276
关键词
4D Printing; biomimetic microstructure; femtosecond laser; photoresist; stimuli-responsive hydrogel; two-photon polymerization
资金
- National Key R&D Program of China [2016YFA0200501, 2016YFC1100502]
- National Natural Science Foundation of China (NSFC) [51673208, 51473176, 61975213, 51901234]
- Beijing Natural Science Foundation [2182079]
- Cooperative R&D Projects between Austria, FFG and China, CAS [GJHZ1720]
- International Partnership Program of Chinese Academy of Sciences [GJHZ2021130]
Inspired by the intelligent response of flytrap, a smart hydrogel microactuator based on a bionic asymmetric structure is demonstrated. The grasping and releasing behavior of the microactuator for micro-objects can be realized and tuned by using pH-triggered shape changes, demonstrating its potential for applications, such as flexible robotics, smart sensors, and microscopic manipulation.
With the development of bionics and nanophotonics, hydrogel microactuators capable of responding to external stimuli to produce controllable deformations have attracted a great deal of interest. These microactuators hold significant promise in areas such as bionic devices, soft robotics, and precision sensors. It is not a trivial task to make such small devices as well as to make them work in a controlled manner. Here, inspired by the intelligent response of flytrap, a smart hydrogel microactuator based on a bionic asymmetric structure is demonstrated. The designed asymmetric microstructure is fabricated by femtosecond laser direct writing with deformation time of 1.2 s and recovery time of 0.3 s. The grasping and releasing behavior of the microactuator for micro-objects can be realized and tuned by using pH-triggered shape changes, demonstrating its potential for applications, such as flexible robotics, smart sensors, and microscopic manipulation.
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