In our group silica thin film systems have been designed and studied during the last decade and more. The goal was to use such films as model supports. Monolayer and Bilayer silica films have been successfully prepared. In fact, the bilayer SiO2 film could be imaged in both, crystalline and amorphous phase. The phase transmission is being studied.Moreover, it has been possible to incorporate aluminium into the film leading to the formation of two-dimensional alumosilicates, i.e. zeolites with �infinite cavities�. The incorporation of aluminium into the bilayer film follows L�wenstein's rule and we demonstrate the formation of bridging OH groups with high acidity. Experimental evidence using STM, FTIR, and XPS are given. This study paves the way for studies in surface science of zeolite surfaces.

Ultra-thin oxide films as designable model catalysts

245th National Meeting (2013)

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