Flavio Leandro de Souza is an accredited researcher by The Brazilian Research Council (CNPq), Associate Professor at Federal University of ABC in Brazil and Visiting Professor at the Materials Science Department, University of California, Davis, USA. His present research is focused on using bottom-up methods for the development of nanostructured materials based on metal oxides with interesting for application in photoelectrochemical cells (PEC) and solar cells devices. Edson Roberto Leite is currently a Professor in the Chemistry Department at Federal University of São Carlos, Brazil. His current research interests include synthesis and growth process of inorganic nanoparticles by chemical approaches, materials characterization by electron microscopy, thermal stability of nanostructured materials and materials for photoelectrochemistry devices and solar water splitting. He is the recipient of several awards, including Scopus Prize for the remarkable scientific production from Elsevier/CAPES(2006) and the John Simon Guggenheim Memorial Foundation Fellowship for the development of scientific research related to the thermal stability of ceramics nanosystem from John Simon Guggenheim Memorial Foundation (2009). A member of the World Academy of Ceramics, he is also Principal Editor of the Journal Materials Research (JRM) and Journal of Nanoparticle Research (JNR).