Gertjan Koster is a Professor at the University of Twente in the Netherlands. He is also a visiting professor at the Joseph Stephan Institute in Slovenia. His current research focuses on the growth and study of artificial materials, the physics of reduced scale (nanoscale) materials, metal–insulator transitions, and in situ spectroscopic characterization. Mark Huijben is a Professor at the University of Twente in the Netherlands. He is also a Guest Scientist of the IEK-1 Electrochemical Storage Department at Forschungszentrum Jülich in Germany. His research currently focuses on nanostructured thin films for advanced energy conversion and storage. Guus Rijnders is a Professor and Chairman of Inorganic Materials Science, University of Twente, Enschede, Netherlands. His research currently focuses on the integration of functional and smart materials with electronic and microelectromechanical systems (MEMS).