S. Wazed Ali, PhD, is an Associate Professor in the Department of Textile and Fibre Engineering at Indian Institute of Technology (IIT) Delhi, India. He has previously worked as a research scientist at multiple firms, and has published widely on piezoelectric energy harvesting devices and related subjects. Satyaranjan Bairagi, PhD, is a Research Associate at the University of Glasgow, UK. He has published extensively on nanotechnology-based piezoelectric and triboelectric materials for nanogenerators and other related topics. Shahid Ul Islam, PhD, is an Assistant Professor in the Department of Applied Sciences and Humanities at Jamia Millia Islamia (A Central University), New Delhi, India. He has previously been a Fulbright Postdoctoral Fellow at the University of California, Davis, United States, and is a life member of the Asian Polymer Association.