The mechanism of TiO2 deposition by direct current magnetron reactive sputtering

Barnes, Mark C., Gerson, Andrea R., Kumar, Sunil, and Hwang, Nong-Moon (2004) The mechanism of TiO2 deposition by direct current magnetron reactive sputtering. Thin Solid Films, 446 (1). pp. 29-36.

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Thin films are generally thought of as being the product of a reaction between the surface and atoms and/or molecules in the gas phase. However, a relatively new theory, the theory of charged clusters (TCC), suggests that charged clusters nucleate in the gas phase and become the growth unit for a thin film. The aim of this study was to determine whether or not TiO2 thin film deposition by DC reactive sputtering occurs via this mechanism. TiO2 was deposited on unheated transmission electron microscopy grids to observe TiO2 clusters, as well as glass and silicon substrates to observe the resulting thin films. The results showed that TiO2 clusters were indeed produced in the chamber of a direct current reactive sputtering system. Furthermore, these clusters were observed as close as 50 mm away from the target. Clusters 3 nm and <2 nm in diameter were found 250 mm and 50 mm away from the target, respectively The cluster size was found to have a direct effect on the film deposited. Smaller clusters produced a facetted crystalline anatase film whereas larger clusters produced an amorphous film.

Item ID: 38181
Item Type: Article (Research - C1)
ISSN: 1879-2731
Keywords: nanostructures; sputtering; clusters; titanium oxide
Funders: Australian Research Council (ARC)
Date Deposited: 09 Apr 2015 03:11
FoR Codes: 02 PHYSICAL SCIENCES > 0204 Condensed Matter Physics > 020406 Surfaces and Structural Properties of Condensed Matter @ 40%
09 ENGINEERING > 0912 Materials Engineering > 091203 Compound Semiconductors @ 20%
10 TECHNOLOGY > 1007 Nanotechnology > 100708 Nanomaterials @ 40%
SEO Codes: 85 ENERGY > 8599 Other Energy > 859999 Energy not elsewhere classified @ 10%
97 EXPANDING KNOWLEDGE > 970102 Expanding Knowledge in the Physical Sciences @ 60%
97 EXPANDING KNOWLEDGE > 970110 Expanding Knowledge in Technology @ 30%
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