Multifunctional metallic backbones for origami robotics with strain sensing and wireless communication capabilities

Haitao Yang; Bok Seng Yeow; Zhipeng Li; Kerui Li; Ting-Hsiang Chang; Lin Jing; Yang Li; John S Ho; Hongliang Ren; Po-Yen Chen

doi:10.1126/scirobotics.aax7020

Multifunctional metallic backbones for origami robotics with strain sensing and wireless communication capabilities

Sci Robot. 2019 Aug 28;4(33):eaax7020. doi: 10.1126/scirobotics.aax7020.

Authors

Haitao Yang¹, Bok Seng Yeow², Zhipeng Li³, Kerui Li¹, Ting-Hsiang Chang¹, Lin Jing¹, Yang Li¹, John S Ho³, Hongliang Ren², Po-Yen Chen^{4

5}

Affiliations

¹ Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585, Singapore.
² Department of Biomedical Engineering, National University of Singapore, Singapore 117583, Singapore.
³ Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore.
⁴ Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585, Singapore. checp@nus.edu.sg.
⁵ Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD 20742, USA.

PMID: 33137786
DOI: 10.1126/scirobotics.aax7020

Abstract

The tight integration of actuation, sensing, and communication capabilities into origami robots enables the development of new-generation functional robots. However, this task is challenging because the conventional materials (e.g., papers and plastics) for building origami robots lack design opportunities for incorporating add-on functionalities. Installing external electronics requires high system integration and inevitably increases the robotic weight. Here, a graphene oxide (GO)-enabled templating synthesis was developed to produce reconfigurable, compliant, multifunctional metallic backbones for the fabrication of origami robots with built-in strain sensing and wireless communication capabilities. The GO-enabled templating synthesis realized the production of complex noble metal origamis (such as Pt) with high structural replication of their paper templates. The reproduced Pt origami structures were further stabilized with thin elastomer, and the Pt-elastomer origamis were reconfigurable and served as the multifunctional backbones for building origami robots. Compared with traditional paper and plastic materials, the reconfigurable Pt backbones were more deformable, fire retardant, and power efficient. In addition, the robots with conductive Pt-elastomer backbones (Pt robots) demonstrated distinct capabilities-such as on-demand resistive heating, strain sensing, and built-in antennas-without the need for external electronics. The multifunctionality of Pt robots was further demonstrated to extend beyond the capabilities of traditional paper-based robots, such as melting an ice cube to escape, monitoring/recording robotic motions in real time, and wireless communications between robots. The development of multifunctional metallic backbones that couple actuation, sensing, and communication enriches the material library for the fabrication of soft robotics toward high functional integration.