Arunkumar Chandrasekhar, PhD, is currently Assistant Professor in the Department of Sensors and Biomedical Technology, Vellore Institute of Technology, India. He worked as a postdoctoral researcher at the Nanomaterials and Systems Laboratory, South Korea. He received his PhD in Mechatronics Engineering from Jeju National University, South Korea, where he was a recipient of a scholarship from the Korean Government Scholarship Program. He received the prestigious Brain Korea 21+ Business Research Award from the Ministry of Education for excellence in research work. He has published forty-three research articles, six journal cover pages, and two book chapters in reputed international journals. He is interested in wearable triboelectric nanogenerators, battery-free electronic devices, energy storage devices, microelectromechanical systems, and self-powered devices.