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In Situ Synthesis of Biocompatible and Functionalizable Core-Shell Conductive Nanocomposites for Stretchable

Yong Lin1,2, Xinyuan Zhou1,2, Cheng Yang1,2

  • 1State Key Laboratory of Analytical Chemistry For Life Science, and Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, China.

Advanced Materials (Deerfield Beach, Fla.)
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Summary
This summary is machine-generated.

Researchers developed a new biocompatible conductor for stretchable electronics using silver nanowires and carbon nanotubes. This material enables advanced wearable devices and biomedical implants for health monitoring and therapies.

Keywords:
biocompatibleimplantable devicesin situ synthesisnanocompositesstretchable electronics

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Nanotechnology

Background:

  • Stretchable electronics require biocompatible and functionalizable conductors, but current silver nanowire (Ag NW) composites face challenges with cytotoxicity and instability.
  • Existing solutions often involve complex noble metal coatings to mitigate these issues, hindering scalability and cost-effectiveness.

Purpose of the Study:

  • To develop a scalable synthesis for a novel biocompatible conductor for stretchable electronics.
  • To create a hierarchical core-shell architecture from silver nanowires (Ag NWs) and carbon nanotubes (CNTs) for enhanced performance and safety.
  • To demonstrate the utility of this new conductor in advanced biomedical applications.

Main Methods:

  • A scalable in situ synthesis was employed to convert a patterned blend of Ag NWs and CNTs into a core-shell structure.
  • The resulting nanocomposite material was characterized for conductivity, stretchability, and biocompatibility.
  • The material's electrochemical stability was assessed to enable direct electroplating of sensing materials.
  • Soft electronic patches were fabricated using the new conductor for in vivo testing.

Main Results:

  • The synthesized material achieved high conductivity (5100 S/cm) and excellent stretchability (>200% strain).
  • The core-shell architecture provided carbon-like biocompatibility, overcoming Ag NW cytotoxicity concerns.
  • The conductor exhibited a broad electrochemical stability window, facilitating sensor integration.
  • In vivo studies demonstrated successful recording of pathological electrograms and closed-loop arrhythmia termination in a rabbit model.

Conclusions:

  • A novel, scalable method for producing biocompatible, stretchable conductors was established using Ag NWs and CNTs.
  • The developed material platform is suitable for advanced soft electronic patches for dynamic skin and organ conformability.
  • This work paves the way for improved wearable health monitoring, medical therapies, and human-machine interfaces.