BPI Seminar by Dr. Sang-Woo Kim

Body Motion- and Ultrasound-Driven Triboelectric Power Generation for Self-Sustained Healthcare Devices

Location: CHBE #102, 2360 East Mall Vancouver BC V6T 1Z4

Agenda

• 4:00 PM Intro by Dr. JuHyuck Lee
• 4:05 PM Presentation by Prof. Sang-Woo Kim, Department of Materials Science and Engineering, Center for Human-oriented Triboelectric Energy Harvesting, Yonsei University
• 4:45 PM Q&A

Abstract

As main topics, this presenter will report transcutaneous ultrasound energy harvesting using triboelectric technology. Implantable medical devices (IMDs) are designed to perform or augment the functions of existing organs by using monitoring, measuring, processing units, and the actuation control. Conventional IMDs are powered with primary batteries that require frequent surgeries for maintenance and replacement. Therefore, IMDs require a new reliable and safe powering system to avoid the need for frequent surgeries. Recently my group demonstrated that ultrasound was used to deliver mechanical energy through skin and liquids and demonstrated that a thin implantable vibrating triboelectric nanogenerator (TENG) is able to effectively harvest it. Ultrasound TENG (US-TENG) was triggered with an applied 20-kHz ultrasound. As the second topic, the presenter will deal with our very recent demonstration of a commercial coin battery-sized high-performance inertia-driven TENG (I-TENG) based on body motion and gravity. In a preclinical test, we demonstrate that the encapsulated device successfully harvested energy using real-time output voltage data monitored via a Bluetooth low-energy information-transmitting system. Finally the presenter will report a self-powered disinfection system for the rapid disinfection of air-transmitted bacteria and viruses based on a highly efficient nanowire-assisted electroporation mechanism powered by vibration-driven TENGs that harvest mechanical vibration energy.

About the Speaker

Dr. Sang-Woo Kim is the YONSEI World-Class Fellow Professor in the Department of Materials Science and Engineering at Yonsei University. He is a Fellow of the Korean Academy of Science and Technology (KAST) and a Member of the National Academy of Engineering of Korea (NAEK). Currently, he is the Director of the Center for Human-oriented Triboelectric Energy Harvesting funded by the National Research Foundation of Korea. His recent research interests are focused on piezoelectric/triboelectric nanogenerators, implantable medical devices, self-powered wearable electronics, and 2D materials. Prof. Kim has a publication record, with over 400 research papers published, including articles in prestigious journals such as Science and Nature (with an H-index of 97). Currently, Dr. Kim holds the positions of Vice President at the Materials Research Society of Korea and Vice President of Korean Sensor Society.

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