Systematic Design of a Graphene Ink Formulation for Aerosol Jet Printing

Livio Gamba, Zachary T. Johnson, Jackie Atterberg, Santiago Diaz-Arauzo, Julia R. Downing, Jonathan C. Claussen, Mark C. Hersam, Ethan B. Secor*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Aerosol jet printing is a noncontact, digital, additive manufacturing technique compatible with a wide variety of functional materials. Although promising, development of new materials and devices using this technique remains hindered by limited rational ink formulation, with most recent studies focused on device demonstration rather than foundational process science. In the present work, a systematic approach to formulating a polymer-stabilized graphene ink is reported, which considers the effect of solvent composition on dispersion, rheology, wetting, drying, and phase separation characteristics that drive process outcomes. It was found that a four-component solvent mixture composed of isobutyl acetate, diglyme, dihydrolevoglucosenone, and glycerol supported efficient ink atomization and controlled in-line drying to reduce overspray and wetting instabilities while maintaining high resolution and electrical conductivity, thus overcoming a trade-off in deposition rate and resolution common to aerosol jet printing. Biochemical sensors were printed for amperometric detection of the pesticide parathion, exhibiting a detection limit of 732 nM and a sensitivity of 34 nA μM-1, demonstrating the viability of this graphene ink for fabricating functional electronic devices.

Original languageEnglish (US)
JournalACS Applied Materials and Interfaces
DOIs
StateAccepted/In press - 2022

Keywords

  • 2D materials
  • electrochemical sensing
  • flexible electronics
  • nanomaterial ink
  • printed electronics

ASJC Scopus subject areas

  • General Materials Science

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