Arun Kumar Singh is Associate Professor at the Department of Pure and Applied Physics, Guru Ghasidas Vishwavidyalaya, India. He received his MSc in Physics from Banaras Hindu University (BHU), India, and PhD from the School of Materials Science and Technology, Indian Institute of Technology (BHU), Varanasi, India. After his PhD, he began postdoctoral research work at the Graphene Research Institute, Sejong University, South Korea. In 2013, he got India's most prestigious research "INSPIRE Faculty" award from the Department of Science and Technology, India, and many other fellowships and awards from scientific societies. He worked as Assistant Professor (INSPIRE faculty) at the Department of Physics, Motilal Nehru National Institute of Technology Allahabad, India. Dr. Singh has authored and co-authored more than 75 articles in international journals and conferences in the areas of materials science and physics. He is also a life member of many scientific societies and a reviewer for several international scientific journals. His research work focuses on the fabrication and characterizations of organic semiconductors/2D nanomaterials/hybrid materials for electronics device applications.