Polydispersity vs. monodispersity. how the properties of ni-ag core-shell nanoparticles affect the conductivity of ink coatings

Anna Pajor-Świerzy*, Dawid Stásko, Radoslaw Pawlowski, Grzegorz Mordarski, Alexander Kamyshny, Krzysztof Szczepanowicz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The effect of polydispersity of nickel-silver core-shell nanoparticles (Ni-Ag NPs) on the conductivity of ink coatings was studied. Ni-Ag NPs of various average diameters (100, 220, and 420 nm) were synthesized and utilized for the preparation of conductive inks composed of monodisperse NPs and their polydisperse mixtures. The shell thickness of synthesized Ni-Ag NPs was found to be in the range of 10-20 nm and to provide stability of a core metal to oxidation for at least 6 months. The conductivity of metallic films formed by inks with monodisperse Ni-Ag NPs was compared with those formed by polydisperse inks. In all cases, the optimal conditions for the formation of conductive patterns (weight ratio of monodisperse NPs for polydisperse composition, the concentration of the wetting agent, sintering temperature, and duration) were determined. It was found that metallic films formed by polydisperse ink containing 100, 220, and 420 nm Ni-Ag NPs with a mass ratio of 1:1.5:0.5, respectively, are characterized by the lowest resistivity, 10.9 uΩcm, after their thermal post-coating sintering at 300 °C for 30 min that is only 1.6 higher than that of bulk nickel.

Original languageAmerican English
Article number2304
JournalMaterials
Volume14
Issue number9
DOIs
StatePublished - 1 May 2021

Bibliographical note

Publisher Copyright:
© 2021 by the authors.

Keywords

  • Conductive properties
  • Core-shell nanoparticles
  • Monodispersity and polydispersity
  • Thermal sintering

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