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Multijet Gold Nanoparticle Inks for Additive Manufacturing of Printed and Wearable Electronics.

Tony Valayil Varghese1,2, Josh Eixenberger2,3,4,5, Fereshteh Rajabi-Kouchi2

  • 1Department of Electrical and Computer Engineering, Boise State University, Boise, Idaho 83725, United States.

ACS Materials Au
|January 15, 2024
PubMed
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Stable, conductive gold nanoparticle inks were developed for printed electronics. These inks enable low-temperature sintering and high-resolution printing for applications like biosensors and flexible devices.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Electronics Engineering

Background:

  • Conductive and biofriendly gold nanomaterial inks are crucial for advanced applications like printed electronics, biosensors, and wearable devices.
  • Existing methods often face challenges in scalability, stability, and low-temperature processing.

Purpose of the Study:

  • To demonstrate the scalable synthesis of stable gold nanoparticle inks.
  • To achieve low-temperature sintering capabilities for printed electronics.
  • To ensure compatibility with multiple printing technologies.

Main Methods:

  • Scalable synthesis of gold nanoparticle inks using simple chemical processing.
  • Formulation of multiprinter compatible aqueous gold nanomaterial inks.
  • Characterization of film resistivity and printing resolution using aerosol jet and inkjet printers.

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Last Updated: Jul 5, 2025

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Main Results:

  • Achieved resistivity as low as ~10^-6 Ω m for 400 nm thick films sintered at 250 °C.
  • Obtained printed lines with <20 μm resolution and minimal overspray via aerosol jet printing.
  • Resistivity reached ~9.59 ± 1.2 × 10^-8 Ω m after sintering at 400 °C for 45 min.

Conclusions:

  • Developed aqueous-formulated gold nanomaterial inks suitable for scalable, low-temperature processing.
  • Demonstrated compatibility with both aerosol jet and inkjet printing, broadening manufacturing possibilities.
  • These inks are promising for printed and flexible electronics requiring specific metal work functions and chemically inert films.