Letter | Published:

Programming magnetic anisotropy in polymeric microactuators

Nature Materials volume 10, pages 747752 (2011) | Download Citation

Abstract

Polymeric microcomponents are widely used in microelectromechanical systems (MEMS) and lab-on-a-chip devices, but they suffer from the lack of complex motion, effective addressability and precise shape control1,2. To address these needs, we fabricated polymeric nanocomposite microactuators driven by programmable heterogeneous magnetic anisotropy. Spatially modulated photopatterning3 was applied in a shape-independent manner to microactuator components by successive confinement of self-assembled magnetic nanoparticles in a fixed polymer matrix. By freely programming the rotational axis of each component, we demonstrate that the polymeric microactuators can undergo predesigned, complex two- and three-dimensional motion.

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Acknowledgements

This work was partly supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MEST) (2011-0016491), supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MEST) (2011-0000545), and supported by Global Frontier Project grant (NRF-M1AXA002-2010-0029797) of the National Research Foundation funded by the Ministry of Education, Science and Technology of Korea.

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Affiliations

  1. School of Electrical Engineering and Computer Science, Seoul National University, San 56-1, Shillim 9-dong, Gwanak-ku, Seoul 151- 744, South Korea

    • Jiyun Kim
    • , Su Eun Chung
    • , Sung-Eun Choi
    • , Howon Lee
    • , Junhoi Kim
    •  & Sunghoon Kwon
  2. Inter-University Semiconductor Research Center (ISRC), Seoul National University, 1 Gwanak-ro, Gwanak-ku, Seoul 151-742, South Korea

    • Jiyun Kim
    • , Su Eun Chung
    • , Sung-Eun Choi
    • , Howon Lee
    • , Junhoi Kim
    •  & Sunghoon Kwon

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Contributions

Jiyun Kim, S.E. Chung and S.K. designed the experiment. Jiyun Kim and S.E. Chung performed the experiments and analysis. S-E. Choi synthesized the magnetic material and gave key advice for the experimental design. H.L. and Junhoi Kim gave key advice for the experimental design. Junhoi Kim also investigated the magnetic properties of the nanoparticles.

Competing interests

The authors declare no competing financial interests.

Corresponding author

Correspondence to Sunghoon Kwon.

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DOI

https://doi.org/10.1038/nmat3090

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