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Professor Kim Sang-woo Wins Scientist of the Month Award
Professor Kim Sang-woo (yna.co.kr)

Professor Kim Sang-woo of Advanced Materials Sciences and Engineering at SKKU developed the technology that can recharge implantable medical devices. It utilizes energy harvesting technology, which collects wasted energy like light and heat and resupplies these energies to a place in need. Prof. Kim was nominated as the winner of April’s Scientist of the Month Award hosted by the Ministry of Science and Information Communication Technologies, recognized for his credit to use harmless ultrasonic waves and static electricity in this research. Until this time, implantable medical devices had a limited battery life, so these devices should be re-implanted after a certain period. For the resolution, various charging methods from outside of a body have been studied, but they could not be commercialized because they could not produce enough electricity. Prof. Kim, however, developed a remote recharging method using medical ultrasonic waves to make triboelectricity on a human-implanted element. This element consists of high-energy perfluoroalkoxy alkanes (PFA) polymer film and a flexible printed circuit board (PCB). When ultrasonic waves reach the element, it makes friction on gold and copper electrodes, and it results in static electricity on a circuit. It takes notice because the mechanism above makes enough electricity to use in general. Prof. Kim said, “This technology is materialized first in the world, and I anticipate it will be applied to many medical technologies so that it will help to make a novel way for implantable medical technologies.” This research was published in Science in August 2019.

신주영  poowooho3@g.skku.edu

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