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PEDOT:PSS Microparticles for Extrudable and Bioencapsulating Conducting Granular Hydrogel Bioelectronics.

Anna P Goestenkors1, Justin S Yu1, Jae Park1

  • 1Department of Biomedical Engineering, Washington University in St. Louis, 1 Brookings Dr, St. Louis, MO, 63130, USA.

Small (Weinheim an Der Bergstrasse, Germany)
|October 8, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a new conducting granular hydrogel from poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS). This adaptable material offers enhanced bioelectronic interfaces for monitoring and stimulating biological activity.

Keywords:
PEDOT:PSSbioelectronic devicesconducting granular hydrogelsconducting microparticleselectrophysiological monitoring

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Polymer Chemistry

Background:

  • Conducting hydrogels are crucial for bioelectronic interfaces but often have fixed shapes, limiting applications.
  • Granular hydrogels offer adaptability (conformal, injectable) in non-conducting biomaterials, a property yet to be explored in conducting systems.
  • Developing adaptable conducting hydrogels is key to advancing bioelectronic interfaces.

Purpose of the Study:

  • To fabricate and characterize a novel conducting granular hydrogel using poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS).
  • To investigate the material's properties, including conductivity, mechanical characteristics, and cytocompatibility.
  • To demonstrate the utility of this conducting granular hydrogel in bioelectronic applications.

Main Methods:

  • Fabrication of spherical PEDOT:PSS hydrogel microparticles.
  • Characterization of the granular hydrogel's microporosity, shear-thinning, and self-healing properties.
  • Assessment of conductivity, 3D printability, and cytocompatibility (>98% cell viability).

Main Results:

  • Successfully created a conducting granular hydrogel with PEDOT:PSS microparticles exhibiting microporosity and dynamic mechanical properties.
  • The material demonstrated shear-thinning, self-healing, and structural integrity post-3D printing.
  • Achieved high conductivity (137 S m⁻¹) and excellent cytocompatibility, proving its potential for bioelectronic applications.

Conclusions:

  • The developed PEDOT:PSS conducting granular hydrogel offers a versatile platform for advanced bioelectronic interfaces.
  • Potential future applications include 3D printed bioencapsulating electrodes, tissue engineering scaffolds, and injectable therapies.
  • This material advances the design of adaptable and functional biomaterials for biomedical applications.