Abstract
Titanate nanorods, nanoribbons, and nanofibers synthesized by
hydrothermal treatment are being investigated by several groups. Similar
to titanate nanotubes, with average diameter of 9 nm, there is a strong
controversy regarding the composition and microscopic formation
mechanism of these non-hollow nanostructures (nanoribbons). In this
article, we report the synthesis and characterization of the titanate
nanostructures by exploiting some aspects that were not exploited so
far. By using X-ray diffraction, FT-infrared and Raman spectroscopies
and electron microscopy, we have studied the intermediate structure and
morphology between nanotubes and the non-hollow nanostructures. Our
findings give further evidence that the transformation of nanotubes into
non-hollow nanostructures is induced by a sequence of both oriented
attachment and Ostwald rippening cooperative mechanisms.
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