Direct Writing of Gallium-Indium Alloy for Stretchable Electronics

wileyonlinelibrary.com properties that make it diffi cult for additive, high throughput, scalable fabrication processes. For example, in the context of inkjet printing, the combination of viscosity, surface tension, and density alone suggest Ga–In alloy to be a non-printable fl uid without modifying either the material or the atmosphere (Supporting Information). Additionally, the fast-forming oxide layer can easily clog a nozzle orifi ce, further increasing the diffi culty of inkjet printing Ga–In alloys. Although inkjet printing of Ga–In alloys has yet to come, there have been recent advancements made in printing Ga–In alloy-based structures. Tabatabai et al. applied micro contact printing to Ga–In alloys and successfully patterned dot arrays, lines, pads and a functioning comb capacitor on elastomer substrates. [ 11 ]