Microfiber-Shaped Programmable Materials with Stimuli-Responsive Hydrogel

Nobuki Takeuchi, Shunsuke Nakajima, Koki Yoshida, Ryuji Kawano, Yutaka Hori, Hiroaki Onoe

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Programmable materials have artificially designed physical shapes responding to external stimuli, as well as high design capability and high flexibility. Here, we propose a microfiber-shaped programmable material with an axial pattern of stimuli-responsive (SR) and nonresponsive hydrogels. The SR pre-gel solution was mixed to sodium alginate pre-gel solution for instantaneous gelation with ionic crosslinking and solidified on a nonresponsive hydrogel microfiber with a valve-controlled microfluidic system. A design of microfiber-shaped programmable material (patterned position of SR regions) could be flexibly altered by changing a coded sequence program. We confirmed that the three-dimensional (3D) coil-like structures were self-folded at the patterned SR regions responding to the thermal stimulus and that the chirality of the self-folded 3D coil-like structures depends on the condition of the stimulus to the microfiber. Finally, interaction with objects using the programmable microfiber as a soft actuator was demonstrated. Our microfiber-shaped programmable materials expand possibilities of fiber-based materials in biomimetics and soft robotics fields.

Original languageEnglish
Pages (from-to)89-97
Number of pages9
JournalSoft Robotics
Issue number1
Publication statusPublished - 2022 Feb


  • biomimetics
  • microfiber
  • programmable materials
  • stimuli-responsive hydrogel
  • valve-controlled microfluidic device

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Biophysics
  • Artificial Intelligence


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