Robots Take Another Step Closer to a 'Natural Smile'

Japanese scientists have managed to recreate living skin using human cells that can adhere to robotic surfaces; robots can display various facial expressions, including a more realistic smile, by attaching this skin to their faces. Researchers from the University of Tokyo recently published their findings along with a video of this sticky pink material, which has been described by news agencies as 'disturbing' due to its natural-looking 'smile.' In their study published in scientific journals, the scientists explain how they used a gel containing skin-producing cells to create this robotic skin. They then covered one of the robots with this 'living skin.' Experts in this field, referred to as 'biohybrids' or 'combined with living cells,' hope that this technology will help create robots with human-like appearances and abilities in the future. This research team, led by Professor Shoji Takuchi, believes that this technology could aid in better understanding how wrinkles form and the physiology of facial expressions, and could also be useful in developing graft materials and cosmetics. Preventing skin aging and improving plastic surgery are other potential applications of this new technology. This new material could replace synthetic skins made from silicone rubber, which lack the ability to sweat or self-repair. The scientists aim to create skin for robots that has self-repairing capabilities, but they have not yet achieved this goal. In previous studies, they demonstrated how to repair this skin by grafting collagen onto cuts made on laboratory skin covering a robotic finger. Collagen, a protein that gives skin structure and elasticity, and skin fibroblasts, which play a role in wound healing, are two main components of skin. By combining these two components in a solution and dipping the robotic finger into it, they successfully created a layer resembling real skin on the robotic finger. This layer adhered well to the robot's surface and covered it. However, conducting similar tests on the new 'smiling' skin will be their next challenge. To create a natural and fluid smile, they turned the new skin-like material into a gelatinous form and fixed it inside holes in the robot's body; a method inspired by the properties of real human skin. Professor Takuchi, the head of the research team, announced that his team is investigating how to create 'circulatory systems' in robotic skin. Their ultimate goal is to create complete robotic skin with all the components of human skin, including sensory neurons, hair follicles, nails, and sweat glands. Although there is still a long way to go to achieve this goal, Dr. Robinson, one of the experts in this field, believes that these findings provide new possibilities for closer collaboration between humans and robots. However, some researchers describe the increasing efforts of several companies to combine humanoid robots with artificial intelligence, without necessary regulations from governments, as a concerning and unpredictable area.