Polyaniline has been prepared via an intercalation mechanism. Sodium ions were intercalated into a layer-structured host material, MoO3, and these were then exchanged for a mixture of neutral aniline and anilinium ions. It was found that aniline intercalated as a bilayer. Polymerisation of the intercalated aniline was then attempted firstly by direct reaction with an oxidising agent in aqueous solution, and then by exposing the dried material to an oxidising vapour. Preliminary characterisation and electrical measurements of the resulting polyaniline nanocomposite have been made.