Reproducible Fabrication of Soft Sensors Based on Direct Ink Writing of Eutectic Gallium-Indium

Abstract

Given the need for stretchable sensors, many studies have been conducted on eutectic gallium-indium (EGaIn), which has superior properties as a conductive ink. However, it has remained a challenge to manufacture sensors in a reproducible manner because conventional mold-based fabrication still depends highly on manual techniques. To overcome this limitation, The direct ink writing (DIW) was used in this study. Multiple sensors produced under the same manufacturing conditions possessed similar behaviors.