Conductive inks with a "built-in" mechanism that enables sintering at room temperature

Michael Grouchko, Alexander Kamyshny, Cristina Florentina Mihailescu, Dan Florin Anghel, Shlomo Magdassi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

294 Scopus citations

Abstract

At present there is no metallic ink that enables formation of conductive patterns at room temperature by a single printing step. Printing conductive features by metallic nanoparticle-based inks must be followed by sintering while heating to elevated temperatures, thus preventing their utilization on most plastic substrates used in plastic electronics. In this report we present a new silver nanoparticle-based conductive ink, having a built-in sintering mechanism, which is triggered during drying of the printed pattern. The nanoparticles that are stabilized by a polymer undergo self-sintering spontaneously, due to the presence of a destabilizing agent, which comes into action only during drying of the printed pattern. The destabilizing agent, which contains Cl- ions, causes detachment of the anchoring groups of the stabilizer from the nanoparticles' surface and thus enables their coalescence and sintering. It was found that the new metallic ink leads to very high conductivities, by a single printing step: up to 41% of the conductivity of bulk silver was achieved, the highest reported conductivity of a printed pattern that is obtained from nanoparticles at room temperature.

Original languageAmerican English
Pages (from-to)3354-3359
Number of pages6
JournalACS Nano
Volume5
Issue number4
DOIs
StatePublished - 26 Apr 2011

Keywords

  • conductive printing
  • plastic electronics
  • silver nanoparticles
  • sintering

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