Tin Oxide Meshes Consisting of Nanoribbons Prepared through an Intermediate Phase in an Aqueous Solution

Novel nanoarchitectures of SnO and SnO 2 crystals that had two- and three-dimensionally meshed structures consisting of nanoribbons were prepared through Sn 6 O 4 (OH) 4 as an intermediate state. Two-dimensional meshes consisting of oriented nanoribbons of single-crystalline tin monoxide (SnO) that was 50−300 nm wide were grown via Sn 6 O 4 (OH) 4, which was initially produced at room temperature. Textured spherical particles with three-dimensional meshed nanostructures were produced at 60 °C in the presence of citric acid in the aqueous system. The formation of the specific architectures is ascribed to the densely branching growth of SnO crystals in a matrix of Sn 6 O 4 (OH) 4 as a reactant. The meshed nanostructures of rutile-type tin dioxide were successfully obtained by oxidation of the SnO crystals without deformation of their architectures.