Bruisable artificial skin could help prosthetics, robots sense injuries

When someone bumps their elbow against a wall, they not only feel pain but also might experience bruising. Robots and prosthetic limbs don't have these warning signs, which could lead to further injury. Now, researchers have developed an artificial skin that senses force through ionic signals and also changes color from yellow to a bruise-like purple, providing a visual cue that damage has occurred.

source https://www.sciencedaily.com/releases/2021/06/210616121613.htm