Professor Takao Someya (Graduate School of Engineering), Associate Professor Tomoyuki Yokota (Graduate School of Engineering), and their colleagues have succeeded in measuring electrocardiograms for one week developing the world’s lightest and thinnest electrodes attached to the skin. This achievement was made possible by using only physical van der Waals force to attach the electrodes to the skin without causing skin inflammation. It is expected to be applied as a wearable device for early detection of illness and poor health. This paper was published in the online edition of the Proceedings of the National Academy of Sciences of the United States of America (PNAS) on September 13.