Interaction of nanoparticle-based conductive inks with solid substrates
Evaluate and optimize the interaction of nanoparticle-based inks with various solids, such as silicon, polymer films and paper. The proposed research will focus on understanding the effect of physicochemical properties of the inks on the interactions upon contact with the substrate: spreading, drying rate and the self-assembly of the conducting particles upon drying onto or within the substrate pores.
Originality and innovative aspects: This WP focuses on functional inks which bring a functional printed material, an electrical conductive surface. In the case of conductive inkjet inks the functional material is a dispersion of metal nanoparticles, such as Ag and Cu, carbon nanotubes and graphene, in water or in an organic solvent. Once the jetted droplets meet a substrate, they will spread, evaporate, and will form a closely packed pattern of the particles. The later processes is governed by the ink properties, as well as the solid substrate properties such as porosity and surface energy. Therefore, these inks should contain, in addition to the functional materials, additives which enable proper performance (dispersing agents, rheological agents, and surface tension modifiers). The innovative aspect of this WP is the development and optimization of inks with tailored properties through fundamental investigation of the effect of the relevant properties on the complex mechanisms of the inkjet printing at its different stages.
Methodologies: Methods of synthesis and characterization of nanoparticles and of the dispersions, inkjet printing, characterization of self-assembled structures using TEM and SEM. The hired ER has to have an expertise in at least one of the experimental techniques and will participate in organization of the summer school “Nanomaterials: formation and applications”.
 S. Magdassi, A. Kamyshny, M. Grouchko, Eur. Coat. J. 11, 54-59 (2006).
List of publications