Reconfigurable logic devices connected with laser-sintered liquid metal nanoparticles

In this paper we demonstrate the use of liquid metal nanoparticles as electrical traces between logic gates. When first deposited, films of nanoparticles are non-conductive, despite their metallic composition. Nanoparticle films can be coalesced into conductive traces using an infrared laser. We demonstrate the utility of this approach by using laser-patterned films to connect NAND gates in different circuits, creating an OR gate and a light-sensitive thermostat. We also show that patterned films can be removed, making the devices re-usable and re-programmable. Liquid metal nanoparticle-based devices may be used to create environmentally responsive devices in the future.