Gyoujin Cho received a Ph.D. degree in chemistry from the University of Oklahoma, Norman, OK, USA, in 1995. From 1996 to 2008, he was with the Department of Chemical Engineering, Sunchon National University, South Korea, as a Professor of Printed Electronics Engineering in the World Class University (WCU) Program at Sunchon National University. Since 2019, he has been a Professor in the Department of Biophysics at Sungkyunkwan University. With special expertise in printed electronics engineering, Prof. Cho has worked on leading fully R2R printed wireless sensors, limitless TFT-active matrix-based signage, and biosensors. He has also served as an Editor of Printing Technologies in Flexible and Printed Electronics, IOP Science, since 2016.