Nazario Martín, PhD, is Full Professor of Organic Chemistry at the University Complutense of Madrid and Vice-Director of the Institute of Madrid for Advanced Studies in Nanoscience, Madrid, Spain. He also served as editor-in-chief for the RSC Publications Journal of Materials Chemistry A, B and C. He has published extensively on carbon nanostructures and related subjects, and his many awards and honours include the 2012 Alexander von Humboldt award. Colin P. Nuckolls, PhD, is Sheldon and Dorothea Professor of Materials Science at Columbia University, New York, USA, where he served as Department Chair from 2008-2011. He also serves as executive editor for the ACS Publications journal NanoLetters, and his wide research experience covers molecular synthesis, reaction chemistry, and many other subjects.