Nano Archive

A microscopy study of the effect of heat treatment on the structure and properties of anodized TiO2 nanotubes

Jaroenworaluck, A. and Regonini, D and Bowen , C.R. and Stevens, R. (2009) A microscopy study of the effect of heat treatment on the structure and properties of anodized TiO2 nanotubes. Applied Surface Science . ISSN 0169-4332 (In Press)

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Abstract

Titanium oxide (TiO2) nanotubes prepared by anodisation of titanium in an aqueous electrolyte and glycerol have been heat treated in the temperature range 200°–600 °C to control the conversion of the amorphous structure to nano-crystalline anatase and rutile. The phase changes have been monitored are observed at lower temperatures (100 °C or more) than previously reported. The sensitivity of the different techniques, each of which depends on the size of the crystalline phase, can explain the discrepancy with previous results. Transmission electron microscopy (TEM) has shown the phase changes which have occurred and which have been reported in an earlier publication; phenomena such as the collapse of the structures explained. The TEM results are consistent with the Raman and XRD data, apart from the transformation temperatures, and also shed light on the nature of an amorphous phase found on the surfaces of the nanotubes.

Item Type:Article
Uncontrolled Keywords:Titanium oxide; Nanotubes; Heat-treatment; Phase change; Electron microscopy
Subjects:Material Science > Nanostructured materials
ID Code:8264
Deposited By:CSMNT
Deposited On:12 Feb 2010 15:49
Last Modified:12 Feb 2010 15:49

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