Effect of Ag Nanowire Addition Into Nanoparticle Paste on the Conductivity of Ag Patterns Printed by Gravure Offset Method

Abstract

This paper focuses on the effect of Ag nanowire addition into a commercial Ag nanopaste and the printability evaluation of the mixed paste by the gravure offset printing methodology. Ag nanowires were synthesized by a modified polyol method, and a small amount of them was added into a commercial metallic paste based on Ag nanoparticles of 50 nm in diameter. Two annealing temperatures were selected for comparison, and electrical conductivity was measured by four point probe method. As a result, the hybrid mixture could be printed by the gravure offset method for patterning fine lines up to 15 μm width with sharp edges and scarce spreading. The addition of the Ag nanowires was significantly efficient for enhancement of electrical conductivity of the printed lines annealed at a low temperature (150 degrees C), while the effect was somewhat diluted in case of high temperature annealing (200 degrees C). The experimental results were discussed with the conduction mechanism in the printed conductive circuits with a schematic description of the electron flows in the printed lines.

Three-Dimensionally Printed Interconnects for Smart Contact Lenses

“…We found that the conductivity of the formed patterns relies on the concentration of AgNW. The resistance of the pure Ag pattern has a relatively high value because of electron scattering at the many contact points of the Ag granules, whereas AgNW, which is an anisotropic material with low defect density that can act as an electron highway, ensures the relatively high conductivity of the Ag/AgNW composite pattern. , Moreover, AgNWs can provide the mechanical properties to the Ag/AgNW composite pattern necessary to conform to the steps. Figure d–f shows the SEM images which illustrate the role of the AgNWs at the steps.…”

Effects of silver nanowire concentration on resistivity and flexibility in hybrid conducting films

“…3. In conducting films, the cause of resistance is the presence of various defects, 30) which, in this case, form a metallic contact area. In pure AgNP films, there are numerous contact areas of AgNPs [Fig.…”

Development of a silver nanoparticle ink for fine line patterning using gravure offset printing

“…In general, gravure offset printing requires viscous inks or pastes that mainly consist of solvents, binders, dispersing agents, and solute particles. 26) Among them, the development of the silver nanoparticle inks for dry offset printing methods is still in its infancy. If we could use appropriate silver nanoparticle inks for gravure offset printing, it would be possible to achieve fine line electrodes with low resistance.…”