Biometric tech sensors can be printed directly onto human skin

Researchers have developed a way to print sensors directly on human skin without using heat.

Wearable sensors are evolving from watches and electrodes to bendable devices that provide far more precise biometric measurements and comfort for users.

The researchers previously developed flexible printed circuit boards for use in wearable sensors, but the bonding process for the metallic components in the sensor has hindered printing directly on skin. Called sintering, this process typically requires temperatures of around 572 degrees Fahrenheit (300 degrees Celsius) to bond the sensor’s silver nanoparticles together.