A research team led by professors at Yonsei University’s Department of Materials Science Engineering and Samsung Medical Center has developed technologies for an electronic drug that does not require battery or electrodes, the university said Monday. Yonsei University professors Kim Sang-woo, Lee Kyu-hyoung and hospital professor Choi Byung-ok published their research in the renowned journal Nature Biomedical Engineering on Friday. The research team developed a technology that enables a wireless electronic drug to relieve pain using ultrasound, by generating triboelectric energy inside the body to selectively block pain signals without the use of pharmaceuticals. Existing electronic drug technologies have faced structural limitations, including inflammation and side effects caused by wires or electrodes connected to nerves. The new research presents a novel form of electronic medicine that eliminates metal electrodes, lead wires and batteries. During a surgical procedure, a biocompatible medical polymer that naturally degrades over time is implanted near the nerves. When pain occurs, a