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Biomimetic magnetic-responsive cilia-like soft device: surface energy control and external field actuation

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Abstract

Many natural systems that are capable of self-regulated, autonomous controlling their shapes, generally match or even exceed the performance of rigid robotic systems. Currently, designing biomimetic soft devices by mimicking the natural intelligence with tunable ability still remains a grand challenge. Herein, we demonstrate a novel biomimetic cilia-like soft device using the magnetic feedback of microrod arrays. Such cilia-like microrod arrays are fabricated by distributing Co nanoparticles into silicon-based polymer. The critical aspect ratio of the microrod arrays can reach 48.7, which is 5.4-times higher than original 9.1 through considerably reducing its surface energy. This large increase in critical aspect ratio will endow the microrods an excellent durability and ensure the posture recovery during the magnate-responsive actuation. Meanwhile, magnetic-responsive Co nanoparticles are aligned and concentrated in the top of each microrod, which leads to the differentiated elastic modulus and ultimate strength along the length. Thereby, as the magnetic field intensity increases, the microrod arrays autonomously perform correspondingly reversible bending deformation without collapse, successfully achieving remotely controlled magnetic actuation. Therefore, this work opens up a new avenue towards soft, autonomous smart devices.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China [Grant Nos. 51705406, 51625504, 51675421, 51705407, 91748209]; the Postdoctoral Science Foundation of China [Grant No. 2016M600785]; and the Postdoctoral Science Foundation of Shaanxi Province [Grant No. 2016BSHEDZZ126]. The author also appreciates the support of the National Key Research and Development Plan for Major Scientific Instruments [Grant No. 2016YFF0100700] and the National Science and Technology Major Project [Grant Nos. 2016ZX04002003-005, and 2016ZX04002004-007].

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Authors and Affiliations

  1. School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi, 710049, People’s Republic of China

    Weitao Jiang, Lanlan Wang, Guoyong Ye, Bangdao Chen, Lei Yin, Yongsheng Shi & Hongzhong Liu

  2. State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi, 710049, People’s Republic of China

    Weitao Jiang, Lanlan Wang, Guoyong Ye, Bangdao Chen, Lei Yin, Yongsheng Shi & Hongzhong Liu

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  1. Weitao Jiang
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  2. Lanlan Wang
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  3. Guoyong Ye
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  4. Bangdao Chen
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  5. Lei Yin
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  6. Yongsheng Shi
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  7. Hongzhong Liu
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Correspondence to Lanlan Wang or Hongzhong Liu.

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Jiang, W., Wang, L., Ye, G. et al. Biomimetic magnetic-responsive cilia-like soft device: surface energy control and external field actuation. J Mater Sci: Mater Electron 30, 3767–3772 (2019). https://doi.org/10.1007/s10854-018-00659-1

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  • DOI: https://doi.org/10.1007/s10854-018-00659-1

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