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A facile and scalable patterning approach for ultrastretchable liquid metal features.

Gaohua Hu1, Shaolei Wang1, Jiyuan Yu1

  • 1College of Engineering and Applied Sciences, State Key Laboratory of Analytical Chemistry for Life Science, and Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing 210046, China. dskong@nju.edu.cn.

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Summary

Researchers developed a new method to pattern liquid metals for stretchable electronics. This technique enables highly stretchable and conductive liquid metal features for advanced soft electronic devices.

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Nanotechnology

Background:

  • Liquid metals offer unique conductivity and deformability for electronics.
  • Current patterning methods limit the widespread use of liquid metals in stretchable electronics.

Purpose of the Study:

  • To develop a facile and scalable patterning approach for liquid metal conductors on elastomer substrates.
  • To enable the creation of ultrastretchable and durable liquid metal features for soft electronics.

Main Methods:

  • A screen-printed silver (Ag) nanoflake pattern was used as a template.
  • Selective coating of a liquid metal layer onto the template was performed.

Main Results:

  • Achieved bulk-level conductivity of approximately 2.7 × 10^4 S cm^-1.
  • Demonstrated ultrahigh stretchability up to 700% tensile strain.
  • Exhibited excellent electromechanical durability and successful fabrication of a ribbon cable and sensing glove.

Conclusions:

  • The developed method provides efficient and economical access to ultrastretchable liquid metal features.
  • This approach facilitates emerging applications in soft electronic devices and systems.
  • The patterning technique overcomes limitations in implementing liquid metals for stretchable electronics.