LAUSR

Abstract In this study, we fabricated fine straight-line patterns of AgNWs from a wet coating strip solution by the coffee-ring effect. The AgNW solution included two kinds of solvents (ethylene glycol and glycerol). The morphologies of the patterns for various process temperatures and glycerol contents were analyzed and discussed. Triple lines can be formed once with the addition of 0.5-wt% glycerol and the process temperature at 90 °C. It is the first time to make triple conductive lines from a wet coating line by the coffee-ring effect. The conductivity of the central line is similar to that of sidelines, featuring the resistivity of 4.05 × 10−7 Ω · m. The formation of the central line may be attributed to the fact that the glycerol possesses a higher boiling point, surface tension, and viscosity than those of ethylene glycol, which make some AgNWs deposit on the central part of the strip through the shrinkage of solvents in later evaporation period.