Novel nanoarchitectures of SnO and SnO2 crystals that had two- and three-dimensionally meshed structures consisting of nanoribbons were prepared through Sn6O4(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 Sn6O4(OH)(4), which was initially produced at room temperature. Textured spherical particles with three-dimensional meshed nanostructures were produced at 60 degrees 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 Sn6O4(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.
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