Electricity is an energy that is constantly used 24 X 7 in all households all over the globe. With an increasing need for electricity, scientists are searching for all kinds of innovative ways to generate cheap and environment-friendly ways of energy. Using yarns to generate and harvest energy is the latest technology. “Twistron” yards are used to harvest energy from ocean wave movement and temperature fluctuations and also through Shirts
The yarns used are coiled carbon nanotube yarns which are created by Texas University in Dallas and from the South Korean, Hanyang University. These high-tech yarns are either twisted or stretched to generate electricity. The twisting yarns are stretched to generate energy. The yarns contain hollow carbon cylinders that are much smaller in diameter than the human hair, about 10,000 times smaller. The elasticity is so high that it looks like coiled rubber bands. The yarns are coated with an ion conductive material, which can also be a simple mix of water and table salt. As supercapacitors, these yarns are charged b the electrolytes and require no external voltage or battery. They provide high electric power and energy output just by twisting and stretching them and make other alternate harvesters to look milder in comparison
The yarns are especially used where charging of batteries is considered impossible. They can be sewn on shirts. It can be considered as a self-powered respiration sensor as the yarns can be stretched just by breathing. The yarns provide more energy than other fibers that can be woven. The electrolyte used is just table salt as well as with ocean water. Electricity generated can also be improved with increased diameter of the twistron and by using many yarns in parallel. Currently, these yarns are used to power sensors and for sensor communication. About 31 mg of carbon nanotube yarn can harvest the energy required to transmit 2 kb packet data covering a distance of 100-meter radius for every 10 seconds over the Internet of Things.