Laser-Induced Graphene for Electrothermally Controlled, Mechanically Guided, 3D Assembly and Human–Soft Actuators Interaction

Yun Ling, Wenbo Pang, Xiaopeng Li, Shivam Goswami, Zheng Xu, David Stroman, Yachao Liu, Qihui Fei, Yadong Xu, Ganggang Zhao, Bohan Sun, Jingwei Xie, Guoliang Huang, Yihui Zhang, Zheng Yan

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Mechanically guided, 3D assembly has attracted broad interests, owing to its compatibility with planar fabrication techniques and applicability to a diversity of geometries and length scales. Its further development requires the capability of on-demand reversible shape reconfigurations, desirable for many emerging applications (e.g., responsive metamaterials, soft robotics). Here, the design, fabrication, and modeling of soft electrothermal actuators based on laser-induced graphene (LIG) are reported and their applications in mechanically guided 3D assembly and human–soft actuators interaction are explored. Over 20 complex 3D architectures are fabricated, including reconfigurable structures that can reshape among three distinct geometries. Also, the structures capable of maintaining 3D shapes at room temperature without the need for any actuation are realized by fabricating LIG actuators at an elevated temperature. Finite element analysis can quantitatively capture key aspects that govern electrothermally controlled shape transformations, thereby providing a reliable tool for rapid design optimization. Furthermore, their applications are explored in human–soft actuators interaction, including elastic metamaterials with human gesture-controlled bandgap behaviors and soft robotic fingers which can measure electrocardiogram from humans in an on-demand fashion. Other demonstrations include artificial muscles, which can lift masses that are about 110 times of their weights and biomimetic frog tongues which can prey insects.

Original languageEnglish (US)
Article number1908475
JournalAdvanced Materials
Volume32
Issue number17
DOIs
StatePublished - Apr 1 2020

Keywords

  • 3D assembly
  • electrothermal actuators
  • human–soft actuators interaction
  • laser-induced graphene

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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