A team of scientists has developed wearable sensors that are made directly on the wearer’s skin without affecting it, as wearable electrical circuits usually consist of flexible sensors or devices that are attached to the skin and stick to it, and their manufacture requires high temperatures, but scientists from Pennsylvania State University have devised a way to manufacture them At room temperature.
The team is working on developing them for use in advanced medical sensors that blend better with the patient’s body, and they have published research in the journal ACS Applied Materials and Intervices..
Temperatures reach 300 ° C during the thermal hardening process, and they are essential for bonding the metals that form flexible electrical circuits.
“The surface of the leather does not tolerate high temperatures, and to bypass this obstacle, we created an auxiliary hardening layer that does not harm the skin, and can harden materials and combine them together at lower temperatures,” said Hanyu Larry Cheng, an engineer from the University of Pennsylvania and lead author of the research.
Cheng and his team were able to gradually reduce the hardening temperature by mixing compounds such as polyvinyl alcohol, which is the main component of face masks used in skin care, which enabled them to carry out the process at room temperature..
This innovation has produced medical sensors specially designed according to the patient’s body dimensions, which are easily removable after washing with warm water.
“These products are recyclable because removing them does not damage the devices and also does not harm the skin, which is extremely important for people with sensitive skin, such as infants and the elderly,” Cheng said. “They fulfill the purpose without burdening the wearer or even the environment. “.