Scientists from the Southern Federal University in Rostov, Russia, are developing nanogenerators that convert city noise into electrical energy and will become independent power sources for phones, watches, headphones, etc.
This research is being conducted by the staff of the Institute of Nanotechnology, Electronics and Devices, where scientists made nanotubes with the addition of nitrogen as a material for their study, and they converted the distortions and vibrations of urban noise, people's movements and conversations into electrical energy. This process is also called the piezoelectric phenomenon.
Marina Elena, an assistant professor, said: "In 2006, the concept of creating nanogenerators based on utilizing the piezoelectric effect in nanostructures to transform mechanical energy from the environment into electrical energy was conceived. Since then, efforts to actualize this concept have persisted in the quest for appropriate materials."
Among the materials with piezoelectric properties are brittle and toxic due to the presence of lead in their composition. The properties of other materials are not high enough to convert energy with the required efficiency.
The scientists studied the effect of engineering and mechanical factors on the piezoelectric variables. It turns out that the nitrogen in the nanotubes increases them, and thus increases the intensity of the current generated. The researchers also proved that lower values of the ratio between the length and diameter of the pipes, from 7 to 30, cause an increase in their efficiency.
This method ill generate a sufficient amount of electrical energy for charging the devices, according to experts.
Source: TASS Published on March 12,2023 @ https://ar.rt.com/uwc7