Structural instabilities in TiO < inf> 2 nanotubes

Document Type

Conference Proceeding

Publication Date



We report the structural instability of TiO2 nanotubes subjected to treatment with ammonium hydroxide (NH4 OH) solution prior to calcination at elevated temperatures. The nanotubes were disintegrated into nanoparticles and the tubular morphology was vanished after 2 h of calcination at 500 °C. High-resolution transmission electron microscopy, Raman spectroscopy, x-ray diffraction, and atomic force microscopy were used to understand the nature of structural collapse in the NH4 OH treated TiO2 nanotubes. It was concluded that the volumetric changes during amorphous to anatase phase transformation and surface cracking was the key role during the collapse of NH4 OH -treated TiO2 nanotubes. © 2010 American Institute of Physics.

Publication Title

Journal of Applied Physics