Spray-on smart skin uses AI to rapidly understand hand tasks

https://techxplore.com/news/2022-12-spray-on-smart-skin-ai-rapidly.html

"millions of nanowires of silver coated with gold... dynamic electrical pathways... biocompatible, breathable, stays on unless rubbed in soap and water... nanowires  get squeezed together and stretched apart, changing electrical conductivity of mesh... measured and analyzed... light-weight Bluetooth module wirelessly transfer... Once algorithm trained, physical keyboard not necessary... recognize sign language or even to recognize objects by tracing their exterior surfaces"

Related: New augmented reality tech can turn any surface into keyboard
https://techxplore.com/news/2025-11-augmented-reality-tech-surface-keyboard.html