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Related Experiment Video

Updated: Jan 9, 2026

Planar and Three-Dimensional Printing of Conductive Inks
10:49

Planar and Three-Dimensional Printing of Conductive Inks

Published on: December 9, 2011

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All 3D Printed Soft Integrated Conductors.

Peiru Liu1, Ligang Yao1, Wei Liu1

  • 1School of Mechanical Engineering and Automation, Fuzhou University, Minhou County, Fuzhou, Fujian 350108, China.

ACS Applied Materials & Interfaces
|December 2, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel conductive hydrogel ink using PEDOT:PSS and PAAm for 3D printing. This soft, skin-like material enables high-resolution circuits with excellent conductivity and flexibility for advanced human-machine interfaces.

Keywords:
3D printingPEDOT:PSSconductive polymerflexible inductorsoft integrated circuits

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Biomedical Engineering

Background:

  • Soft integrated circuits mimic skin properties, offering potential for human-machine interfaces and biomedical devices.
  • Current manufacturing methods for flexible circuits are complex, limiting their widespread application and innovation.

Purpose of the Study:

  • To develop a novel composite ink for high-resolution 3D printing of soft integrated circuits.
  • To create a conductive hydrogel with excellent mechanical properties, conductivity, and stability for advanced electronic applications.

Main Methods:

  • A composite ink was formulated using PEDOT:PSS (3,4-ethylenedioxythiophene/styrenesulfonate) and PAAm (polyacrylamide).
  • The ink was processed using high-resolution direct ink writing (DIW) 3D printing.
  • A cross-linking process transformed the ink into a conductive hydrogel, followed by post-treatment.

Main Results:

  • The 3D-printed hydrogel achieved conductivity of 62 S/m (gel state) and 311 S/m (dry gel state).
  • The material demonstrated a significant strain capacity of 210% and maintained high stability in water.
  • Wireless transmission of electrical signals was achieved through printed miniature 3D circuits.

Conclusions:

  • The developed conductive hydrogel ink offers a promising platform for fabricating high-performance soft integrated circuits via 3D printing.
  • Its biocompatibility and robust properties suggest significant potential for implantable electronic engineering and advanced sensing applications.