In recent years, mechanically deformable devices and sensors have been widely explored for various applications such as paper-thin displays and electronic skin for prosthetics and robotics. Liquids are extremely deformable and have shown promise for these applications, with previous works demonstrating pressure sensors with the ability to be stretched by up to 250% before failure.However, current technology is limited to a single liquid material as liquids tend to intermix when placed together, limiting the range of sensors that can be achieved. Here, in this work, we show a new concept for a liquid- liquid hetero-junction temperature sensor with liquid InGaSn metal as a passive interconnect and an imidazolium based ionic liquid as the active sensing element. By proper choice of liquids and design of the liquid-liquid interface, we are able to prevent the liquids from mixing, leading to exciting prospects for more complex liquid based flexible electronics.
Project end date: 01/27/16