Permanent tattoos not an option? Temporary ones could be a simple substitute. Last month, researchers in Illinois announced new peelable electronic circuits that can be rubbed onto the skin just like a temporary tattoo. The small circuits can bend and stretch with the skin, resisting breakage just like a well-moisturized epidermis.
This research yielded several breakthroughs, from the adhering method — rubs on with water, just like a temporary tattoo — to the fabrication process, which enables bendy versions of semiconductor materials that are brittle when in bulk form.
The semiconductor circuits could be used to monitor muscle activity, heart activity or even brain waves, researchers said.