Investigation on repeatable and consistent direct writing of eutectic gallium-indium (EGaIn) and its application to a soft sensor

摘要

In this study, direct ink writing (DIW) of eutectic gallium-indium (EGaIn) is introduced and the important process variables (PVs) are introduced and discussed. To fabricate the soft sensor in a stable manner, it was very important to ensure the flatness of the substrate. In addition, wettability of EGaIn on the substrate significantly affects the printing performance. Therefore, it is necessary to investigate the proper combination of PVs by understanding the mechanism of EGaIn DIW.