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Pectoral electricity generator
Collecting statics with human skin, a new flexible generator capable of delivering enough current to power the small electronics, for example, medical sensors, LED or even fitness tracker! That is, it can simply be attached to the body - and never recharge the batteries.
This is a very promising prototype developers from the National University of Singapore, presented at a recent conference IEEE MEMS 2015 . The conference was shown exactly how the fitness tracker on such a generator, пишет IEEE Spectrum. Open access scientific work is not published yet.
The news went unnoticed by many media outlets, even though this is the crucial instrument. Get enough electricity from the human body - is one of the most promising challenges of modern science. This technology will greatly affect the human civilization, changing lifestyles, habits of people and, among other things, providing them with affordable health sensors that will save millions of lives, and other electronics underwear.
Engineers have long tried to make effective nanogenerators body. For example, for this применяли piezomaterials type MoS 2 sub>, which produce current under mechanical stress, stretching and compression.
But in 2012, it was announced that новом type generators , triboelectric effect is used, - electrifying bodies when approaching them very close to each other. In this case the surface of both bodies is going to static electricity.
Some even tried to do nanogenerator, like a toy Slinky . Such a pressure sensor does not require external power. The energy comes from the simple compression and tension during operation.
The National University of Singapore have gone further. They decided to use as a triboelectric layers of human skin. The second layer - a thousand pillared structures of nanometer size (larger area) with a flexible layer of rubber. Under the rubber - a thin layer of gold film thickness of 50 nm, it acts electrode.
This film can be attached anywhere on the skin, which is constantly in motion (ie, where the pulse is felt, for example, around the neck or wrist). Engineers have pasted it on the wrist, and gave a clenched fist generator 7, 3V. If you attach to the neck, then during a call issued 7, 5V.
The biggest current 90V / 0, 8mVt obtained if to touch your finger to the generator. This current is enough to power 12 commercially available on the market today LEDs!
Naturally, the currents grow if we increase the size of the film or the density of columnar structures inside. Film is harmless to the skin. Scary to imagine how much electricity is obtained if it wrap large areas of the body.
Source: geektimes.ru/post/245574/
