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The construction principle of the fibre is quite simple. Compared with other types of miniature energy-harvesting devices, the FFNG showed a superior power conversion efficiency of more than 20 per cent, researchers said.Researchers developed a fibre with thickness of less than a millimetre generating electricity when surrounded by flowing saline solution Carbon nanotubes are well known to be electroactive and mechanically stable (Photo: Pixabay) China Spandex Fabric manufacturers Beijing: Chinese scientists have developed a lightweight power generator that can convert even the energy of flowing blood into electricity.

"The electricity was derived from the relative movement between the FFNG and the solution," scientists said. If woven into fabrics, wearable electronics become a very interesting option for FFNG application.The power output efficiency of this system was high.Now, researchers from Fudan University in China have developed a fibre with a thickness of less than a millimetre that generates electrical power when surrounded by flowing saline solution - in a thin tube or even in a blood vessel.For thousands of years, people have used the energy of flowing or falling water for different purposes, first to power mechanical engines such as watermills, then to generate electricity by exploiting height differences in the landscape or sea tides.For power generation, the thread or "fibre-shaped fluidic nanogenerator" (FFNG) was connected to electrodes and immersed into flowing water or simply repeatedly dipped into a saline solution.

An ordered array of carbon nanotubes was continuously wrapped around a polymeric core. First tests with frog nerves proved to be successful, researchers said.Another exciting application is the harvesting of electrical energy from the bloodstream for medical applications.The FFNG can be made stretchable just by spinning the sheets around an elastic fibre substrate.Carbon nanotubes are well known to be electroactive and mechanically stable; they can be spun and aligned in sheets.An electrical double layer is created around the fibre, and then the flowing solution distorts the symmetrical charge distribution, generating an electricity gradient along the long axis.Other advantages are elasticity, tunability, lightweight, and one-dimensionality, thus offering prospects of exciting technological applications, they said.In the electroactive threads, the carbon nanotube sheets coated the fibre core with a thickness of less than half a micron