Usman Khan received his PhD degree in Sensorial and Learning System Engineering from the University of Rome “Tor Vergata” in May 2014. His PhD work was focused on the design of circular-symmetric microheaters. After PhD, he pursued postdoc research at NEXT and carried out COMSOL based thermo-fluid-dynamic simulations of the wet-chemistry growth system of ZnO nanogenerators. In May 2015, he joined the Nano Electronic Science and Engineering Laboratory (NESEL) of Sungkyunkwan University (SKKU), South Korea. At NESEL, he is conducting research on tribotronic tactile sensors and nanogenerators. He is currently a Research Professor at NESEL, SKKU. His research interests include design, simulation, fabrication and characterization of 2D materials, MEMS and NEMS for energy harvesting, sensing and actuation.