ABSTRACT
At the beginning of 21st century, research on nanoparticles confined to fluid interfaces, liquid/liquid and gas/liquid interfaces, started to develop. Some of these interfaces are polarized. They are formed by two immiscible electrolyte solutions or ionic liquid(s), and they are often abbreviated ITIES: interface between two immiscible electrolyte solutions. The presence of ions in both phases allows for control of potential drop across ITIES, which affects the formation and properties of confined nanoobjects. This chapter starts from general characterization of fluid interfaces. Next the concept of ITIES is introduced, and the formation of nanoparticulate film by self-assembly and electrodeposition is described. That part is followed by depictions of electrocatalysis at ITIES modified with nanoparticles and optical properties of such interface.
