Yiannis Deligiannakis earned his M.Sc. in 1990 and Ph.D. in 1994 from the Institute of Materials Science, NCSR Demokritos, Athens. He is now Head of the Lab of Physical Chemistry of Materials & Environment, Department of Physics, University of Ioannina (Ioannina, Greece). He was elected Visiting Professor at the Department of Mechanical and Process Engineering, ETH Zurich, Switzerland, in 2012. He is an Editorial Board Member of Nanomaterials and EnergiesJournals at MDPI. His research topics mainly include nanoparticles’ physics (photo semiconductor, plasmonics, magnetic, H-coupled e-transfer), industrial-scale nanomaterials synthesis by flame spray pyrolysis (FSP), advanced electron paramagnetic resonance (EPR) spectroscopy, catalysis using nanomaterials (H2 production, water splitting, photocatalysis), environmental technology using nanohybrids, natural organic matter physical chemistry, and solid–solution interface physical chemistry.