New sensors can be printed directly on human skin

Scientists from China have presented a method of printing sensors directly onto human skin. This does not require heating or other painful procedures.

The researchers explained that wear-resistant sensors have evolved a lot in recent years – we have now moved from watches and electrodes to bendable devices that provide much more accurate biometric measurements. Therefore, an international team of researchers printed the sensors directly onto human skin without heating. Previously, temperatures of 300 degrees Celsius were used for this – the patient cannot tolerate them painlessly.

Therefore, the researchers changed the formula of the auxiliary layer, the printed material and found that the skin can now be printed directly on the patient’s skin. The auxiliary layer for printing at room temperature consists of a paste of polyvinyl alcohol, the main ingredient in peelable face masks, calcium carbonate, which is composed of eggshell. The layer reduces the roughness of the printed surface and produces an ultra-thin layer of metallic patterns that can bend and bend while maintaining electromechanical capabilities.

The sensors are able to accurately and continuously record temperature, humidity, blood oxygen levels and pulse. The researchers also networked the sensors on the body into a wireless network to track a combination of signals as they passed.

The process is also environmentally friendly. The sensor stays strong in cool water for several days. “The device can be recycled as removing it will not damage it. This is especially important for people with sensitive skin such as the elderly and babies. The device is useful and does not constitute an additional burden on humans or the environment”.