Junghyo Nah received the Ph.D. degree in electrical and computer engineering from The University of Texas at Austin, Austin, TX, USA, in 2010. He worked as a Post-Doctoral Scholar with the University of California at Berkeley, Berkeley, CA, USA, from 2011 to 2012. He joined the Department of Electrical Engineering, Chungnam National University, Daejeon, South Korea, as a Faculty Member, in 2012, where he is currently a Professor. His research interests include piezoelectric and triboelectric energy-harvesting devices, high-performance air filters, and low-dimensional semiconductor devices and sensors.