Millions of people can no longer imagine their lives without personal electronic devices that perform many useful functions. Their Achilles' heel is dependence on a power source that needs to be recharged periodically.
However, scientists have already come close to solving this problem. Currently, simultaneously in several countries, research is being carried out on the creation of electronic devices that work at the expense of human bioenergy.
A team of researchers at the National University of Singapore has developed a skin patch that generates 90 volts from a simple tap of a finger. Its energetic "abilities" were also tested on the skin of the jaw and forearm, where the movements produced released 7, 3 and 7.5 volts, respectively.
The patch skin consists of two layers. The top layer is a 50 nm thick gold film that acts as an electrode and the bottom layer is silicone rubber covered with thousands of microscopic pillars that create a large surface area for contact with human skin during friction.
So far, patch skin is used only as an autonomous power source for a sensor that monitors the parameters of a person's movement. Its important advantage is the ability to install it on almost any part of the body, without any restrictions on size and shape. In the not too distant future, patch skin may become a full-fledged power source for various smart devices.