Rheological Investigation of Silver Colloids Based on Ethylene Glycol

Ink-jet printing of colloidal metals is an attractive method for direct patterning of electrically conductive structures and interconnects in electronic devices, owing to low-cost, low-waste, and simplicity of the process. Since metal nanoparticles usually tend to agglomerate, a stabilizing agent (surfactant) has to be used. The viscosity of the suspension must also be carefully controlled in order to have a low enough viscosity at a high metal loading. In the present work, mixtures of well-dispersed silver nanoparticles, ethylene glycol, and three different surfactants at variousvolume ratios were prepared, and the effect of surfactant chemistry and content on the sedimentation behavior was evaluated. The effect of high-intensity ultrasonic treatment and temperature on the rheological properties was investigated in detail utilizing a rheometer in plate-plate geometry.

کلیدواژه ها:

Viscosity ، metal colloids ، Ink-jet printing ، Sedimentation