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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/2441

Title: Amorphous to anatase transformation in atomic layer deposited titania thin films induced by hydrothermal treatment at 120°C.
Authors: Zhang, ZM
Triani, G
Fan, LJ
Keywords: Thin Films
Titanium
Amorphous State
Deposition
Hydrothermal Systems
Phase Transformations
Issue Date: Sep-2008
Publisher: Materials Research Society
Citation: Zhang, Z. M., Triani, G., & Fan, L. J. (2008). Amorphous to anatase transformation in atomic layer deposited titania thin films induced by hydrothermal treatment at 120°C. Journal of Materials Research, 23(9), 2472-2479.
Abstract: Hydrothermal treatment has been applied successfully to convert amorphous titania films to crystalline anatase at 120°C, a temperature compatible with most polymeric substrates. The amorphous films were deposited at 80°C using atomic layer deposition (ALD). The crystallinity of the films was monitored by x-ray absorption near edge structure (XANES), and the film composition was determined by x-ray photoelectron spectroscopy (XPS). The effect of precursor chemistry and substrate material was investigated. It was found that titania films produced from Ti isopropoxide are easier to crystallize than those from Ti tetrachloride as the Ti precursor. The amorphous to crystalline transformation can be achieved more readily with films deposited on Si than polycarbonate substrates. The effect of a “seed” layer on the amorphous to crystalline transformation was also studied. Preformed anatase crystallites between the Si substrate and the amorphous film were shown to accelerate the crystallization process. The possible mechanisms responsible for the phase transformation are discussed. © 2008, Materials Research Society
URI: http://dx.doi.org/10.1557/JMR.2008.0297
http://apo.ansto.gov.au/dspace/handle/10238/2441
ISSN: 0884-2914
Appears in Collections:Journal Articles

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