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Light-induced crawling of crystals on a glass surface

Author

Listed:
  • Emi Uchida

    (Electronics and Photonics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST))

  • Reiko Azumi

    (Electronics and Photonics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST))

  • Yasuo Norikane

    (Electronics and Photonics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST))

Abstract

Motion is an essential process for many living organisms and for artificial robots and machines. To date, creating self-propelled motion in nano-to-macroscopic-sized objects has been a challenging issue for scientists. Herein, we report the directional and continuous motion of crystals on a glass surface when irradiated simultaneously with two different wavelengths, using simple azobenzenes as a photoresponsive organic compound. The direction of the motion can be controlled by the position of the light sources, and the crystals can even climb vertical surfaces. The motion is driven by crystallization and melting at the front and rear edges of the crystal, respectively, via photochemical conversion between the crystal and liquid phases induced by the trans–cis isomerization of azobenzenes. This finding could lead to remote-controlled micrometre-sized vehicles and valves on solid substrates.

Suggested Citation

  • Emi Uchida & Reiko Azumi & Yasuo Norikane, 2015. "Light-induced crawling of crystals on a glass surface," Nature Communications, Nature, vol. 6(1), pages 1-7, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8310
    DOI: 10.1038/ncomms8310
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    Cited by:

    1. Mehdi Rohullah & Vuppu Vinay Pradeep & Shruti Singh & Rajadurai Chandrasekar, 2024. "Mechanically controlled multifaceted dynamic transformations in twisted organic crystal waveguides," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    2. Xuesong Yang & Linfeng Lan & Xiuhong Pan & Qi Di & Xiaokong Liu & Liang Li & Panče Naumov & Hongyu Zhang, 2023. "Bioinspired soft robots based on organic polymer-crystal hybrid materials with response to temperature and humidity," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    3. Xuesong Yang & Linfeng Lan & Ibrahim Tahir & Zainab Alhaddad & Qi Di & Liang Li & Baolei Tang & Panče Naumov & Hongyu Zhang, 2024. "Logarithmic and Archimedean organic crystalline spirals," Nature Communications, Nature, vol. 15(1), pages 1-11, December.

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