December 02 2008 / by Garry Golden
Category: Technology Year: 2019 Rating: 7 Hot
What if you could charge your portable device simply by having it move around in your pocket while you walk?
Texas A&M Professor Tahir Cagin believes that piezeoelectric materials, that convert motion into electric currents could be closer to applied applications thanks to their recent design breakthrough. (Not Image shown)
Professor Cagin and partners from the University of Houston are using piezoelectric material that can covert energy at a 100 percent increase when manufactured at a very small size – in this case, around 21 nanometers in thickness.
"When materials are brought down to the nanoscale dimension, their properties for some performance characteristics dramatically change," said Cagin who is a past recipient of the prestigious Feynman Prize in Nanotechnology. "One such example is with piezoelectric materials. We have demonstrated that when you go to a particular length scale – between 20 and 23 nanometers – you actually improve the energy-harvesting capacity by 100 percent.
"We're studying basic laws of nature such as physics and we're trying to apply that in terms of developing better engineering materials, better performing engineering materials. We're looking at chemical constitutions and physical compositions. And then we're looking at how to manipulate these structures so that we can improve the performance of these materials."
"Even the disturbances in the form of sound waves such as pressure waves in gases, liquids and solids may be harvested for powering nano- and micro devices of the future if these materials are processed and manufactured appropriately for this purpose," Cagin said.
Why is this important to the future?
Micro power systems are in high demand for portable gadgets and sensors like RFID tags used on products in 'smart supply chain' logistics. While batteries and micro fuel cells might be required for higher demand applications, piezeoelectric systems could find a role in the world of micro-power.
Research findings will be published this fall in "Physical Review B," the scientific journal of the American Physical Society
Materials and quotes sourced from EureakAlert Press release