Overview
- University of Glasgow engineers report zinc-based circuits printed on paper, bioplastics and demonstration materials such as chocolate.
- The fabrication process electroplates bulk zinc on a temporary carrier and transfers five‑micron conductive tracks to biodegradable bases, replacing copper traces.
- The team says 99% of materials can be safely disposed of through soil composting or by dissolving in common chemicals like vinegar.
- Lab devices including tactile sensors, LED counters and temperature sensors showed performance comparable to conventional boards with stability after more than a year in ambient conditions.
- A life‑cycle assessment estimates 79% lower global warming potential and 90% lower resource depletion than standard PCBs, as researchers explore IoT and disposable‑sensor applications within the REACT program in response to rising e‑waste.