News & Meida

Our latest research on contactless self-powered sensor system got featured on University portal and different natural news portals. Triboelectric nanogenerators (TENGs), which operate in contactless mode and avoid physical contact, are highly attractive for self-powered sensor systems aiming to achieve long-term reliable operation and reduce rubbing friction. Herein, an ultra-flexible and high-performance contactless double-layer TENG (CDL-TENG) is first designed and fabricated using a metal–organic framework-based cobalt nanoporous carbon (Co-NPC)/Ecoflex with MXene/Ecoflex nanocomposite layer for self-powered sensor applications. The porous structure of the Co-NPC provides a high-surface-area of the nanocomposite and the charge storage layer of the MXene/Ecoflex nanocomposite accumulates more negative charge to improve the functionality of the CDL-TENG two and three times, respectively. Compared with Ecoflex film-based TENGs, the fabricated CDL-TENG exhibits an eight-fold slower decay rate owing to charge trapping characteristics, which were confirmed by surface potential measurements. The CDL-TENG shows excellent humidity and acceleration sensitivity of about 0.3 V/% and 2.06 Vs² m⁻¹. The CDL-TENG also offers non-contact position detection performance in the 20 cm range. Furthermore, the CDL-TENG is successfully integrated with mobile-vehicles and an intelligent robot to perform obstacle and human-motion detection. Finally, a contactless door-lock password authentication system was demonstrated. These multifunctional benefits make it useful for numerous applications, including artificial intelligence, human-machine interfaces, and self-powered sensors.

<Schematic illustration of the CO-NPC/Ecoflex nanocomposite based double-layer non-contact mode TENG>

<Advanced Functional Materials Cover Image>

Featured in Kwangwoon University

National Media Coverages:

https://lifenlearning.chosun.com/pan/site/data/html_dir/2022/01/04/2022010400869.html

http://www.dhnews.co.kr/news/articleView.html?idxno=201953

https://news.mt.co.kr/mtview.php?no=2022010410287462794

https://www.asiatime.co.kr/article/20220104500214

http://news.unn.net/news/articleView.html?idxno=522115

https://www.rozeus.com/@%ED%95%9C%EA%B5%AD%EB%8C%80%ED%95%99%EC%8B%A0%EB%AC%B8/post/2266254

https://news.nate.com/view/20220104n14028

https://cnews.pinpointnews.co.kr/view.php?ud=202201041438447789accfd60e02_45