Scientists from Tel Aviv university have managed to make a transistor out of some of the same building blocks that we are made from: proteins. After gathering proteins from blood, mucus and breast milk, the researchers went about trying to make a silicon-free circuit that performs the same tasks as it’s metallic brethren. And they succeeded.
Biological circuits could well be the next major step forward for technology. Basing circuits off of biology means that they should be cheaper, as the parts can be farmed, rather than mined. It also means that the circuits are biodegradable, so leftover parts will just melt back into the ground when we recycle them. Also, being able to base circuits off of biology means that biocompatibility will be improved.
When we eventually start having electronics embedded into our body they could be made from ourselves, so our bodies won’t react like the circuits are foreign intruders. That means that the circuits can be far more stable and, in the far, far future, repaired by our own bodies when damaged.
Right now, the researchers have only managed to make transistors. They are hoping that they can use their transistors to power a display, but complete circuits are still quite a ways off.