Using theoretical structure search methods (e.g. global optimisation, data mining) and classical and quantum mechanical modelling we determine the structure and properties of technologically important inorganic materials (e.g. ZnO, TiO₂, CeO₂) when one or more of their dimensions is reduced to the nanoscale. Our studies range from nanoclusters and nanoparticles to nanofilms and nanoporous materials. We also study how the non-bulk-like properties of inorganic nanoclusters can provide inspiration for novel nanostructured materials (e.g. low density polymorphs) for technological applications.