Research at the University of Rhode Island, which was funded by the U.S. National Science Foundation, has developed a bandage that can detect whether a covered wound is becoming infected. What they did was embed nano sensors into the fibers of the bandage. When a wound is covered with a bandage there is always the possibility of it becoming infected. The carbon nanotubes will identify an infection by detecting concentrations of hydrogen peroxide produced in the wound when bacteria are present. This “Smart Bandage” will be monitored by a small, wearable device that will transmit a signal to a smartphone which the patient or caregiver will receive. Hope is that by early detection of an infection there will be less need for antibiotics and even more drastic occurrences such as limb removal. This could be life saving especially for patients with diabetes who have difficulty with wound healing and for those living in remote rural areas. Verification of the product still needs to be done with live culture cells found in wounds via a petri dish.
https://beta.nsf.gov/news/smart-bandage-detects-may-prevent-infections#:~:text=By%20embedding%20nanosensors%20in%20the,an%20infection%20in%20a%20wound.