Dr. Niravkumar J. Joshi is a physicist, having completed his doctorate at the Maharaja Sayajirao University of Baroda, India. He is Marie-Curie experienced researcher (TecnioSPRING) at the University of Barcelona, Spain. He has postdoctoral experience in South Korea, Brazil, and the University of California Berkeley, USA, where he developed selective and sensitive microsensors by MEMS techniques. His present research focuses on the synthesis and characterization of oxide nanostructures and 2D material-based gas sensors. Dr. Gautam Patel obtained Doctoral degree from the M. S. University of Baroda, Vadodara. He is the Head & Associate Professor, Chemistry Department, Parul Institute of Applied Science, Parul University, Vadodara, Gujarat, India. His area of specialization is Organic Synthesis, Green Chemistry, Nano Sciences and Nano technology.